Hình vuông
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</div><p></p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h2-1664715795.jpg.webp" width="243" height="243" alt="hinh-anh-hinh-vuong-1167-1" title="hinh-anh-hinh-vuong-1167-1" loading="lazy"></p> <p>Hình vuông ABCD có:</p> <ul> <li>4 góc đỉnh A, B, C, D đều là góc vuông.</li> <li>4 cạnh có độ dài bằng nhau: AB = BC = CD = DA</li> </ul> <p>Hình vuông có bốn góc vuông và bốn cạnh bằng nhau.</p> <h3 id="1">1.</h3> <p>a) Đọc tên các hình vuông có trong hình dưới đây:</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h3-1664715997.jpg.webp" width="620" height="342" alt="hinh-anh-hinh-vuong-1167-2" title="hinh-anh-hinh-vuong-1167-2" loading="lazy"></p> <p>b) Đo rồi cho biết độ dài các cạnh của mỗi hình vuông ở hình trên.</p> <h3 id="2-dugraveng-ecirc-ke-vagrave-thuoc-thang-kiem-tra-xem-moi-higravenh-sau-coacute-phai-higravenh-vuocircng-hay-khocircng">2. Dùng ê ke và thước thẳng kiểm tra xem mỗi hình sau có phải hình vuông hay không.</h3> <p>a)</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h4-1664716181.jpg.webp" width="233" height="222" alt="hinh-anh-hinh-vuong-1167-3" title="hinh-anh-hinh-vuong-1167-3" loading="lazy"></p> <p>b)</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h5-1664716216.jpg.webp" width="241" height="245" alt="hinh-anh-hinh-vuong-1167-4" title="hinh-anh-hinh-vuong-1167-4" loading="lazy"></p> <h3 id="3-necircu-caacutech-ke-thecircm-mot-doan-thang-de-duoc-higravenh-vuocircng">3. Nêu cách kẻ thêm một đoạn thẳng để được hình vuông:</h3> <p>a)</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h6-1664716296.jpg.webp" width="196" height="197" alt="hinh-anh-hinh-vuong-1167-5" title="hinh-anh-hinh-vuong-1167-5" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
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</div><p></p> <p>b)</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h7-1664716326.jpg.webp" width="300" height="188" alt="hinh-anh-hinh-vuong-1167-6" title="hinh-anh-hinh-vuong-1167-6" loading="lazy"></p> <h3 id="4-ve-higravenh-vuocircng-trecircn-luoi-ocirc-vuocircng-theo-huong-dan-sau">4. Vẽ hình vuông trên lưới ô vuông theo hướng dẫn sau:</h3> <p style="text-align: center;"><img src="/uploads/tinymce/b52-h8-1664716380.jpg.webp" width="242" height="215" alt="hinh-anh-hinh-vuong-1167-7" title="hinh-anh-hinh-vuong-1167-7" loading="lazy"></p> <p style="text-align: center;"><img src="/uploads/tinymce/b52-h9-1664716396.jpg.webp" width="242" height="211" alt="hinh-anh-hinh-vuong-1167-8" title="hinh-anh-hinh-vuong-1167-8" loading="lazy"></p> <p style="text-align: center;"><img src="/uploads/tinymce/b52-h10-1664716417.jpg.webp" width="244" height="247" alt="hinh-anh-hinh-vuong-1167-9" title="hinh-anh-hinh-vuong-1167-9" loading="lazy"></p> <h3 id="5-thuc-hagravenh">5. Thực hành:</h3> <p>Vẽ một hình vuông trên giấy thủ công có lưới ô vuông rồi cắt ra hình vuông đó.</p> <p><img style="display: block; margin-left: auto; margin-right: auto;" src="/uploads/tinymce/b52-h11-1664716481.jpg.webp" width="561" height="235" alt="hinh-anh-hinh-vuong-1167-10" title="hinh-anh-hinh-vuong-1167-10" loading="lazy"></p><div> <div class="ads-horizontal-wrapped">
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