TRẦN MINH TƯỜNG: C8

Hiển thị các bài đăng có nhãn C8. Hiển thị tất cả bài đăng

Bài 1. Điểm. Đường thẳng

<p> </p><br />Giải bài 1 trang 86 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Em hãy nêu cách kí hiệu của điểm và đường thẳng</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Trong các chữ cái A, a, B, b, C, c những chữ cái nào dùng để kí hiệu điểm, những chữ cái nào dùng để kí hiệu đường thẳng?</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,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" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nhắc lại lý thuyết về cách kí hiệu đường thẳng</p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Người ta dùng các chữ cái in hoa (A, B, C, ..)  để kí hiệu cho điểm, các chữ cái in thường (a, b, c, …) để kí hiệu cho đường thẳng.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Những chữ cái dùng để kí hiệu điểm: A, B, C</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Những chữ cái dùng để kí hiệu đường thẳng: a, b, c, …</p></div></div>Giải bài 2 trang 86 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Hãy gọi tên đường thẳng trong Hình 1, Hình 2.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Dùng các kí hiệu để đặt tên cho đường thẳng trong Hình 3 bằng hai cách</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,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" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Đường thẳng có thể được đặt tên bởi các chữ cái in thường hoặc hai điểm bất kì thuộc đường thẳng đó.</p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Hình 1: đường thẳng AB</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Hình 2: đường thẳng k</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) có thể dùng các chữ cái in thường hoặc hai chữ cái in hoa để kí hiệu đường thẳng trong hình 3, như sau:</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Cách 1: đường thẳng d</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Cách 2: Đường thẳng MN ( M, N là hai điểm phân biệt bất kì thuộc đường thẳng ở hình 3)</p></div></div>Giải bài 3 trang 86 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Quan sát hình vẽ dưới đây, hãy sử dụng các kí hiệu <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#x2208;</mo><mo>,</mo><mo>&#x2209;</mo></math>" id="MathJax-Element-1-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-1" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-2" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mo" id="MJXc-Node-3" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mo" id="MJXc-Node-4" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: -0.181em 0px 0px; padding: 0px 0px 0.553em; white-space: pre;">,</span></span><span class="mjx-mo MJXc-space1" id="MJXc-Node-5" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.167em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.416em 0px 0.553em; white-space: pre;">∉</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>∈</mo><mo>,</mo><mo>∉</mo></math></span></span> thích hợp để điền vào chỗ chấm.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">A … d;</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">B … d;</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">C … d.</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,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" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nếu đường thẳng d đi qua điểm A thì ta kí hiệu <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mo>&#x2208;</mo><mi>d</mi></math>" id="MathJax-Element-2-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-6" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-7" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-8" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.507em 0px 0.278em; white-space: pre;">A</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-9" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-10" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∈</mo><mi>�</mi></math></span></span>, ngược lại ta kí hiệu <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mo>&#x2209;</mo><mi>d</mi></math>" id="MathJax-Element-3-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-11" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-12" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-13" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.507em 0px 0.278em; white-space: pre;">A</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-14" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.416em 0px 0.553em; white-space: pre;">∉</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-15" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∉</mo><mi>�</mi></math></span></span></p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Dễ thấy đường thẳng d đi qua các điểm B và C và điểm A không nằm trên đường thẳng d</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Ta kí hiệu:</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mo>&#x2209;</mo><mi>d</mi></math>" id="MathJax-Element-4-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-16" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-17" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-18" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.507em 0px 0.278em; white-space: pre;">A</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-19" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.416em 0px 0.553em; white-space: pre;">∉</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-20" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∉</mo><mi>�</mi></math></span></span></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>B</mi><mo>&#x2208;</mo><mi>d</mi></math>" id="MathJax-Element-5-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-21" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-22" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-23" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0px 0.278em; white-space: pre;">B</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-24" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-25" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∈</mo><mi>�</mi></math></span></span></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>C</mi><mo>&#x2208;</mo><mi>d</mi></math>" id="MathJax-Element-6-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-26" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-27" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-28" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.045em 0.278em 0px; white-space: pre;">C</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-29" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-30" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span></span></p></div></div><br />Giải bài 4 trang 87 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Vẽ đường thẳng b</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Vẽ điểm M không nằm trên đường thẳng b.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Vẽ điểm N nằm trên đường thẳng b.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">c) Sử dụng các kí hiệu <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mo>&#x2208;</mo><mo>,</mo><mo>&#x2209;</mo></math>" id="MathJax-Element-1-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-1" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-2" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mo" id="MJXc-Node-3" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mo" id="MJXc-Node-4" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: -0.181em 0px 0px; padding: 0px 0px 0.553em; white-space: pre;">,</span></span><span class="mjx-mo MJXc-space1" id="MJXc-Node-5" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.167em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.416em 0px 0.553em; white-space: pre;">∉</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mo>∈</mo><mo>,</mo><mo>∉</mo></math></span></span> để viết các mô tả sau: “ Điểm N thuộc đường thẳng b; điểm M không thuộc đường thẳng b”.</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,iVBORw0KGgoAAAANSUhEUgAAAAoAAAAGCAYAAAD68A/GAAAAGXRFWHRTb2Z0d2FyZQBBZG9iZSBJbWFnZVJlYWR5ccllPAAAA2ZpVFh0WE1MOmNvbS5hZG9iZS54bXAAAAAAADw/eHBhY2tldCBiZWdpbj0i77u/IiBpZD0iVzVNME1wQ2VoaUh6cmVTek5UY3prYzlkIj8+IDx4OnhtcG1ldGEgeG1sbnM6eD0iYWRvYmU6bnM6bWV0YS8iIHg6eG1wdGs9IkFkb2JlIFhNUCBDb3JlIDUuMy1jMDExIDY2LjE0NTY2MSwgMjAxMi8wMi8wNi0xNDo1NjoyNyAgICAgICAgIj4gPHJkZjpSREYgeG1sbnM6cmRmPSJodHRwOi8vd3d3LnczLm9yZy8xOTk5LzAyLzIyLXJkZi1zeW50YXgtbnMjIj4gPHJkZjpEZXNjcmlwdGlvbiByZGY6YWJvdXQ9IiIgeG1sbnM6eG1wTU09Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC9tbS8iIHhtbG5zOnN0UmVmPSJodHRwOi8vbnMuYWRvYmUuY29tL3hhcC8xLjAvc1R5cGUvUmVzb3VyY2VSZWYjIiB4bWxuczp4bXA9Imh0dHA6Ly9ucy5hZG9iZS5jb20veGFwLzEuMC8iIHhtcE1NOk9yaWdpbmFsRG9jdW1lbnRJRD0ieG1wLmRpZDoxM0UzREU1OEVDMzZFODExQkQ5N0VEMEYzMTQyQzg0NSIgeG1wTU06RG9jdW1lbnRJRD0ieG1wLmRpZDo5NTFEMTQyQTM3QUExMUU4OTg2OUQ0MzRDMEZGNkVBQiIgeG1wTU06SW5zdGFuY2VJRD0ieG1wLmlpZDo5NTFEMTQyOTM3QUExMUU4OTg2OUQ0MzRDMEZGNkVBQiIgeG1wOkNyZWF0b3JUb29sPSJBZG9iZSBQaG90b3Nob3AgQ1M2IChXaW5kb3dzKSI+IDx4bXBNTTpEZXJpdmVkRnJvbSBzdFJlZjppbnN0YW5jZUlEPSJ4bXAuaWlkOjEzRTNERTU4RUMzNkU4MTFCRDk3RUQwRjMxNDJDODQ1IiBzdFJlZjpkb2N1bWVudElEPSJ4bXAuZGlkOjEzRTNERTU4RUMzNkU4MTFCRDk3RUQwRjMxNDJDODQ1Ii8+IDwvcmRmOkRlc2NyaXB0aW9uPiA8L3JkZjpSREY+IDwveDp4bXBtZXRhPiA8P3hwYWNrZXQgZW5kPSJyIj8+eFCcKwAAAHdJREFUeNpiDA0NvcXAwDAbiLsZsINSIE5lAhIbgbgLiLOxKMqGym1iARJlQCwAxJOB+AsQL4QqioeKzQWZClL4H4gzgJgbKvgVqhDEXgnE6SA1LFDBv1ATQIqXQsW2QsVAcgwsSO75DcShIPdA+WFA/AsmCRBgAO7AGQt+AUtuAAAAAElFTkSuQmCC" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nếu đường thẳng d đi qua điểm A thì ta kí hiệu <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mo>&#x2208;</mo><mi>d</mi></math>" id="MathJax-Element-2-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-6" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-7" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-8" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.507em 0px 0.278em; white-space: pre;">A</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-9" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-10" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∈</mo><mi>�</mi></math></span></span>, ngược lại ta kí hiệu <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>A</mi><mo>&#x2209;</mo><mi>d</mi></math>" id="MathJax-Element-3-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-11" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-12" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-13" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.507em 0px 0.278em; white-space: pre;">A</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-14" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.416em 0px 0.553em; white-space: pre;">∉</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-15" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∉</mo><mi>�</mi></math></span></span></p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a), b)  </p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">            <img height="102" src="https://img.loigiaihay.com/picture/2022/1020/capture_31.PNG" style="height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px;" width="305" />                               <strong style="font-family: OpenSansBold; margin: 0px; padding: 0px;">                            </strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong style="font-family: OpenSansBold; margin: 0px; padding: 0px;"></strong>c) <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>N</mi><mo>&#x2208;</mo><mi>d</mi></math>" id="MathJax-Element-4-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-16" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-17" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-18" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.085em 0.278em 0px; white-space: pre;">N</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-19" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.232em 0px 0.37em; white-space: pre;">∈</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-20" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∈</mo><mi>�</mi></math></span></span>; <span class="mjx-chtml MathJax_CHTML" data-mathml="<math xmlns="http://www.w3.org/1998/Math/MathML"><mi>M</mi><mo>&#x2209;</mo><mi>d</mi></math>" id="MathJax-Element-5-Frame" role="presentation" style="border: 0px; direction: ltr; display: inline-block; float: none; font-size: 21.78px; line-height: 0; margin: 0px; max-height: none; max-width: none; min-height: 0px; min-width: 0px; overflow-wrap: normal; padding: 1px 0px; position: relative; text-align: left; white-space: nowrap; word-spacing: normal;" tabindex="0"><span aria-hidden="true" class="mjx-math" id="MJXc-Node-21" style="border-collapse: separate; border-spacing: 0px; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mrow" id="MJXc-Node-22" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-mi" id="MJXc-Node-23" style="box-sizing: content-box !important; display: inline-block; margin: 0px; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.081em 0.278em 0px; white-space: pre;">M</span></span><span class="mjx-mo MJXc-space3" id="MJXc-Node-24" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-main-R" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-main-R, MJXc-TeX-main-Rw; margin: 0px; padding: 0.416em 0px 0.553em; white-space: pre;">∉</span></span><span class="mjx-mi MJXc-space3" id="MJXc-Node-25" style="box-sizing: content-box !important; display: inline-block; margin: 0px 0px 0px 0.278em; padding: 0px;"><span class="mjx-char MJXc-TeX-math-I" style="box-sizing: content-box !important; display: block; font-family: MJXc-TeX-math-I, MJXc-TeX-math-Ix, MJXc-TeX-math-Iw; margin: 0px; padding: 0.461em 0.003em 0.278em 0px; white-space: pre;">d</span></span></span></span><span class="MJX_Assistive_MathML" role="presentation" style="border: 0px !important; clip: rect(1px, 1px, 1px, 1px); display: block !important; height: 1px !important; left: 0px; margin: 0px; overflow: hidden !important; padding: 1px 0px 0px !important; position: absolute !important; top: 0px; user-select: none; width: 1px !important;"><math xmlns="http://www.w3.org/1998/Math/MathML"><mi>�</mi><mo>∉</mo><mi>�</mi></math></span></span>.</p><div><br /></div><div style="line-height: 26px; margin: 0px; padding: 0px;"></div></div><ins class="982a9496" data-key="8c1a76b9ab4d8e1356920626d3ae545d" style="margin: 0px; padding: 0px;"></ins></div><br />Giải bài 5 trang 87 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Trong hình bên, em hãy chỉ ra</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Những điểm nào thuộc đường thẳng p những điểm nào không thuộc đường thẳng p, những điểm nào không thuộc đường thẳng p;</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Những đường thẳng nào chứa điểm A, điểm B, điểm C, điểm D, điểm E.</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,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" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nếu đường thẳng d đi qua điểm A thì ta nói điểm A thuộc đường thẳng d hoặc đường thẳng d chứa điểm A.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nếu đường thẳng d không đi qua điểm A thì ta nói điểm A không thuộc đường thẳng d hoặc đường thẳng d không chứa điểm A.</p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Những điểm thuộc đường thẳng p: B, E, A</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Những điểm không thuộc đường thẳng p: C, D</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Những đường thẳng chứa điểm A: m, p, k</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Những đường thẳng chứa điểm B: n, p</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Những đường thẳng chứa điểm C: n, k</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Đường thẳng chứa điểm D: n</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Đường thẳng chứa điểm E: p.</p></div></div><div>Giải bài 6 trang 87 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Hãy vẽ hình trong các trường hợp sau:</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a) Điểm K thuộc cả hai đường thẳng a và b.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) Điểm K thuộc đường thẳng a nhưng không thuộc đường thẳng b.</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,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" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nếu điểm A thuộc đường thẳng d thì ta vẽ a nằm trên đường thẳng d hoặc đường thẳng d đi qua điểm A.</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Nếu điểm A không thuộc đường thẳng d thì đường thẳng d không đi qua điểm A hoặc đường thẳng d không chứa điểm A.</p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">a)</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><img height="128" src="https://img.loigiaihay.com/picture/2022/1020/capture_29.PNG" style="height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px;" width="267" /></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">b) <strong style="font-family: OpenSansBold; margin: 0px; padding: 0px;">        </strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><img height="124" src="https://img.loigiaihay.com/picture/2022/1020/capture_30.PNG" style="height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px;" width="282" /></p></div></div><br />Giải bài 7 trang 87 sách bài tập Toán 6 - Chân trời sáng tạo Tập 2<div class="detail_new" style="background-color: white; font-family: OpenSans, Tahoma, Helvetica, sans-serif; font-size: 16px; line-height: 26px; margin: 0px; padding: 0px 5px; word-break: break-word;"><div class="center bottom10" style="margin-bottom: 10px !important; margin-left: 0px; margin-right: 0px; margin-top: 0px; padding: 0px; text-align: center;"><ins class="982a9496" data-key="032300ccaf074f044010600ff650587e" style="margin: 0px; padding: 0px;"></ins></div><div class="post-toc" id="post-toc-container" style="margin: 0px; padding: 0px;"></div><div id="box-content" style="font-size: 18px; line-height: 26px; margin: 0px; padding: 0px; text-align: justify;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_question" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Đề bài</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Vẽ ba điểm sao cho chúng không cùng nằm trên một đường thẳng. Cứ qua hai điểm ta vẽ một đường thẳng. Hỏi có bao nhiêu đường thẳng được tạo thành?</p><div class="content_method_container" style="line-height: 26px; margin: 0px; padding: 10px 0px 2px;"><p class="content_method_header" style="background: rgb(252, 241, 196); border-radius: 5px; cursor: pointer; line-height: 26px; margin: 0px; padding: 10px; text-align: center; word-break: normal;"><strong class="content_method" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Phương pháp giải - Xem chi tiết</strong><img class="method-open-icon" id="method_colapse_icon" src="data:image/png;base64,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" style="float: right; height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px; position: relative; top: 10px;" /></p><div class="content_method_content" style="border-bottom: 1px dashed rgb(234, 214, 126); border-image: initial; border-left: 1px dashed rgb(234, 214, 126); border-right: 1px dashed rgb(234, 214, 126); border-top: none; line-height: 26px; margin: 0px 0px 10px; padding: 10px 10px 5px;"><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Bước 1: lấy 3 điểm A, B, C không cùng thuộc một đường thẳng</p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;">Bước 2: Vẽ các đường thẳng lần lượt đi qua hai điểm trong 3 điểm trên.</p></div></div><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><strong class="content_detail" style="font-family: OpenSansBold; margin: 0px; padding: 0px;">Lời giải chi tiết</strong></p><p style="line-height: 26px; margin: 0px 0px 12px; padding: 0px; word-break: normal;"><img height="211" src="https://img.loigiaihay.com/picture/2022/1020/capture_28.PNG" style="height: auto; margin: 0px; max-height: 100%; max-width: 100%; padding: 0px;" width="262" /></p></div></div></div>