{"id":17867,"date":"2025-07-05T17:15:05","date_gmt":"2025-07-05T10:15:05","guid":{"rendered":"https:\/\/www.ckconitsha.com\/vn\/?p=17867"},"modified":"2025-07-06T22:05:44","modified_gmt":"2025-07-06T15:05:44","slug":"tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc","status":"publish","type":"post","link":"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/","title":{"rendered":"T\u1ea5t t\u1ea7n t\u1eadt ki\u1ebfn th\u1ee9c v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng trong h\u00ecnh h\u1ecdc"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-grey ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><\/span><\/div>\n<nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Khoi_lap_phuong_la_gi\" >Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng l\u00e0 g\u00ec?<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dac_diem_tinh_chat_cua_hinh_lap_phuong\" >\u0110\u1eb7c \u0111i\u1ec3m t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dau_hieu_nhan_biet_khoi_lap_phuong\" >D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Cac_cong_thuc_lien_quan_toi_hinh_lap_phuong\" >C\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan t\u1edbi h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Cong_thuc_tinh_chu_vi\" >C\u00f4ng th\u1ee9c t\u00ednh chu vi<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Cong_thuc_tinh_dien_tich\" >C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Cong_thuc_tinh_the_tich\" >C\u00f4ng th\u1ee9c t\u00ednh th\u1ec3 t\u00edch<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Cong_thuc_tinh_duong_cheo_hinh_lap_phuong\" >C\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Huong_dan_cach_ve_khoi_lap_phuong_trong_toan_hoc\" >H\u01b0\u1edbng d\u1eabn c\u00e1ch v\u1ebd kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng trong to\u00e1n h\u1ecdc<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Cac_dang_bai_tap_thuong_gap_ve_hinh_lap_phuong_bac_tieu_hoc\" >C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp th\u01b0\u1eddng g\u1eb7p v\u1ec1 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng b\u1eadc ti\u1ec3u h\u1ecdc<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dang_1_Cong_thuc_%E2%80%93_dinh_nghia\" >D\u1ea1ng 1: C\u00f4ng th\u1ee9c \u2013 \u0111\u1ecbnh ngh\u0129a<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dang_2_Quan_sat_hinh_nhan_dien_do_vat_khoi_hop_chu_nhat_va_khoi_lap_phuong\" >D\u1ea1ng 2: Quan s\u00e1t h\u00ecnh, nh\u1eadn di\u1ec7n \u0111\u1ed3 v\u1eadt kh\u1ed1i h\u1ed9p ch\u1eef nh\u1eadt v\u00e0 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dang_3_Dem_khoi_lap_phuong\" >D\u1ea1ng 3: \u0110\u1ebfm kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dang_4_Ke_ten_do_vat_co_hinh_lap_phuong\" >D\u1ea1ng 4: K\u1ec3 t\u00ean \u0111\u1ed3 v\u1eadt c\u00f3 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dang_5_Tinh_dien_tichchu_vithe_tich_khoi_lap_phuong\" >D\u1ea1ng 5: T\u00ednh di\u1ec7n t\u00edch\/chu vi\/th\u1ec3 t\u00edch kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Bi_quyet_giup_be_hoc_toan_hinh_lap_phuong_dat_hieu_qua_cao\" >B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc to\u00e1n h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Xay_dung_nen_tang_hoc_toan_vung_chac_cho_be_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\" >X\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng h\u1ecdc to\u00e1n v\u1eefng ch\u1eafc cho b\u00e9 c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Dam_bao_be_nam_vung_kien_thuc_ve_khoi_lap_phuong\" >\u0110\u1ea3m b\u1ea3o b\u00e9 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Thuc_hanh_nhieu_hon_la_dieu_khong_the_thieu\" >Th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 thi\u1ebfu<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Mot_so_luu_y_khi_day_be_hoc_hinh_lap_phuong\" >M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi d\u1ea1y b\u00e9 h\u1ecdc h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#H2_Mot_so_bai_tap_ve_khoi_lap_phuong_de_be_tu_luyen\" >H2: M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng \u0111\u1ec3 b\u00e9 t\u1ef1 luy\u1ec7n<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/www.ckconitsha.com\/vn\/tat-tan-tat-kien-thuc-ve-khoi-lap-phuong-trong-hinh-hoc\/#Ket_luan\" >K\u1ebft lu\u1eadn<\/a><\/li><\/ul><\/nav><\/div>\n<\/p>\n<p>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn th\u1ee9c h\u00ecnh h\u1ecdc m\u00e0 t\u1eeb c\u1ea5p 1 h\u1ecdc sinh \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00e0m quen. \u0110\u1ec3 gi\u00fap c\u00e1c em hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 th\u1ec3 lo\u1ea1i h\u00ecnh h\u1ecdc n\u00e0y, c\u0169ng nh\u01b0 n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t v\u1ec1 h\u00ecnh, h\u00e3y c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef kh\u00e1m ph\u00e1 chi ti\u1ebft h\u01a1n trong b\u00e0i vi\u1ebft sau nh\u00e9.<\/p>\n<p>                                                                    <img decoding=\"async\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img_default\/monkey3.png\" alt=\"\"><\/p>\n<p class=\"title\">H\u00e0ng tri\u1ec7u tr\u1ebb em \u0111\u00e3 ph\u00e1t tri\u1ec3n kh\u1ea3 n\u0103ng ng\u00f4n ng\u1eef c\u1ee7a m\u00ecnh th\u00f4ng qua c\u00e1c \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp c\u1ee7a Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef<\/p>\n<p class=\"description\">\u0110\u0103ng k\u00fd ngay \u0111\u1ec3 \u0111\u01b0\u1ee3c Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef t\u01b0 v\u1ea5n mi\u1ec5n ph\u00ed v\u1ec1 s\u1ea3n ph\u1ea9m v\u00e0 l\u1ed9 tr\u00ecnh h\u1ecdc cho con.<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i h\u1ecd t\u00ean<\/p>\n<p>                                                                            *Vui l\u00f2ng ki\u1ec3m tra l\u1ea1i S\u0110T<\/p>\n<p>                                                                                Th\u00e0nh th\u1ea1o 2.000+ t\u1eeb &amp; 6.000 c\u00e2u ti\u1ebfng anh<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n to\u00e0n di\u1ec7n 4 k\u1ef9 n\u0103ng ti\u1ebfng anh<br \/>\n                                                                                Gi\u1ecfi To\u00e1n &#8211; ti\u1ebfng Anh theo ph\u01b0\u01a1ng ph\u00e1p hi\u1ec7n \u0111\u1ea1i<br \/>\n                                                                                Ph\u00e1t tri\u1ec3n EQ &amp; kh\u1ea3 n\u0103ng ti\u1ebfng Vi\u1ec7t<\/p>\n<p>                                                                                *B\u1ea1n ch\u01b0a ch\u1ecdn m\u1ee5c n\u00e0o!<\/p>\n<p>                                                                    \u0110\u0103ng K\u00fd T\u01b0 V\u1ea5n Mi\u1ec5n Ph\u00ed<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Khoi_lap_phuong_la_gi\"><\/span>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng l\u00e0 g\u00ec?<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Trong t\u1ea5t c\u1ea3 c\u00e1c lo\u1ea1i h\u00ecnh h\u1ecdc, kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng \u0111\u01b0\u1ee3c bi\u1ebft \u0111\u1ebfn l\u00e0 m\u1ed9t kh\u1ed1i platon 3 chi\u1ec1u, \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean b\u1edfi 12 c\u1ea1nh b\u1eb1ng nhau. Trong \u0111\u00f3, c\u1ea3 6 m\u1eb7t c\u1ee7a kh\u1ed1i \u0111\u1ec1u l\u00e0 h\u00ecnh vu\u00f4ng c\u00f9ng v\u1edbi 8 \u0111\u1ec9nh t\u01b0\u01a1ng \u1ee9ng v\u1edbi 8 \u0111i\u1ec3m.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-1.jpg\" alt=\"\u0110\u1eb7c \u0111i\u1ec3m kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dac_diem_tinh_chat_cua_hinh_lap_phuong\"><\/span>\u0110\u1eb7c \u0111i\u1ec3m t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">V\u1edbi m\u1ed9t kh\u1ed1i \u0111\u01b0\u1ee3c xem l\u00e0 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng khi c\u00f3 nh\u1eefng t\u00ednh ch\u1ea5t sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 6 m\u1eb7t ph\u1eb3ng l\u00e0 h\u00ecnh vu\u00f4ng \u0111\u1ed1i x\u1ee9ng b\u1eb1ng nhau<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 12 c\u1ea1nh b\u1eb1ng nhau<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u01b0\u1eddng ch\u00e9o c\u1ee7a c\u00e1c m\u1eb7t b\u00ean \u0111\u1ec1u b\u1eb1ng nhau<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">\u0110\u01b0\u1eddng ch\u00e9o h\u00ecnh kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng b\u1eb1ng nhau<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dau_hieu_nhan_biet_khoi_lap_phuong\"><\/span>D\u1ea5u hi\u1ec7u nh\u1eadn bi\u1ebft kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 c\u00f3 th\u1ec3 nh\u1eadn bi\u1ebft \u0111\u01b0\u1ee3c h\u00ecnh l\u1eadp ph\u01b0\u01a1ng, ta c\u00f3 th\u1ec3 d\u1ef1a v\u00e0o nh\u1eefng \u0111\u1eb7c \u0111i\u1ec3m sau \u0111\u00e2y:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c m\u1eb7t b\u00ean c\u1ee7a h\u00ecnh l\u00e0 6 h\u00ecnh vu\u00f4ng b\u1eb1ng nhau<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">C\u00e1c m\u1eb7t b\u00ean c\u00f3 \u0111\u01b0\u1eddng ch\u00e9o c\u00f3 \u0111\u1ed9 d\u00e0i b\u1eb1ng nhau.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u00ecnh kh\u1ed1i c\u00f3 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o c\u0169ng c\u00f3 \u0111\u1ed9 d\u00e0i b\u1eb1ng nhau.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_cong_thuc_lien_quan_toi_hinh_lap_phuong\"><\/span>C\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan t\u1edbi h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Khi t\u00ecm hi\u1ec3u v\u1ec1 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng, h\u1ecdc sinh c\u1ea7n ph\u1ea3i n\u1eafm r\u00f5 c\u00e1c c\u00f4ng th\u1ee9c li\u00ean quan t\u1edbi h\u00ecnh. C\u1ee5 th\u1ec3:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-2.jpg\" alt=\"C\u00f3 nhi\u1ec1u c\u00f4ng th\u1ee9c xoay quanh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">T\u1ed5ng qu\u00e1t: Cho h\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u1ea1nh a, \u0111\u01b0\u1eddng ch\u00e9o m\u1eb7t b\u00ean l\u00e0 d, \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0 D<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_chu_vi\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh chu vi<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\" style=\"text-align: center\">P= 12.a<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">P l\u00e0 chu vi h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_dien_tich\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi di\u1ec7n t\u00edch c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng s\u1ebd ch\u01b0a ra th\u00e0nh 2 lo\u1ea1i: Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n v\u00e0 di\u1ec7n t\u00edch xung quanh. C\u1ee5 th\u1ec3:<\/p>\n<p dir=\"ltr\">Di\u1ec7n t\u00edch h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u01b0\u1ee3c chia ra l\u00e0m hai lo\u1ea1i: Di\u1ec7n t\u00edch xung quanh v\u00e0 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n<\/p>\n<p dir=\"ltr\"><em>* C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch xung quanh c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0:<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Sxq = a2.4<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Sxq l\u00e0 di\u1ec7n t\u00edch xung quanh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\"><em>*C\u00f4ng th\u1ee9c t\u00ednh di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/em><\/p>\n<p dir=\"ltr\" style=\"text-align: center\">Stp = a2.6<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Stp l\u00e0 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_the_tich\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh th\u1ec3 t\u00edch<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 th\u1ef1c hi\u1ec7n t\u00ednh th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh l\u1eadp c\u00e1c b\u1ea1n \u00e1p d\u1ee5ng c\u00f4ng th\u1ee9c:<\/p>\n<p dir=\"ltr\" style=\"text-align: center\">V =a.a.a= a3<\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">V l\u00e0 th\u1ec3 t\u00edch h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<\/ul>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cong_thuc_tinh_duong_cheo_hinh_lap_phuong\"><\/span>C\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Trong kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng, \u0111\u01b0\u1eddng ch\u00e9o c\u1ee7a h\u00ecnh s\u1ebd h\u1ee3p v\u1edbi c\u00e1c \u0111\u01b0\u1eddng cao t\u1ea1o th\u00e0nh 1 tam gi\u00e1c vu\u00f4ng<\/p>\n<p dir=\"ltr\">\u00c1p d\u1ee5ng \u0111\u1ecbnh l\u00fd Py-ta-go, ta c\u00f3 c\u00f4ng th\u1ee9c t\u00ednh \u0111\u01b0\u1eddng ch\u00e9o D:<\/p>\n<p dir=\"ltr\"><img loading=\"lazy\" decoding=\"async\" style=\"margin-left: auto;margin-right: auto\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/lh4.googleusercontent.com\/k_dShb1xfSIRGm30CwujAvcBWWb5OJ3OBsce8-Kda8b_LwxlGf705o50NdTdjUbw21L5dLTQNLLXPNcHqBW0VYlRAiWamjnp0th3VMOSf75a-aClXtwzytvm6I5kuZmH-KhYyU534txx61dgSgufF7XutldwbNw2dpMggLSEFpRMh4vz00BakL8VWw\" width=\"119\" height=\"36\"><\/p>\n<p dir=\"ltr\">Trong \u0111\u00f3:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">D l\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng ch\u00e9o h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">d l\u00e0 \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng ch\u00e9o 1 m\u1eb7t<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">a l\u00e0 \u0111\u1ed9 d\u00e0i c\u1ea1nh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Huong_dan_cach_ve_khoi_lap_phuong_trong_toan_hoc\"><\/span>H\u01b0\u1edbng d\u1eabn c\u00e1ch v\u1ebd kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng trong to\u00e1n h\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 v\u1ebd h\u00ecnh kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng ABCDEFGH<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 1: V\u1ebd m\u1eb7t \u0111\u00e1y h\u00ecnh l\u1eadp ph\u01b0\u01a1ng ABCDEFGH l\u00e0 h\u00ecnh vu\u00f4ng ABCD<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 2: L\u1ea7n l\u01b0\u1ee3t d\u1ef1ng c\u00e1c \u0111\u01b0\u1eddng cao c\u00f3 \u0111\u1ed9 d\u00e0i a t\u01b0\u01a1ng \u1ee9ng v\u1edbi c\u00e1c \u0111\u1ec9nh c\u1ee7a m\u1eb7t \u0111\u00e1y, ta \u0111\u01b0\u1ee3c c\u00e1c \u0111\u01b0\u1eddng cao t\u01b0\u01a1ng \u1ee9ng l\u00e0 AE,BF,CG,DH=a.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u01b0\u1edbc 3: N\u1ed1i c\u00e1c \u0111\u1ec9nh E, F, G, H l\u1ea1i v\u1edbi nhau ta \u0111\u01b0\u1ee3c kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng ABCDEFGH<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">* L\u01b0u \u00fd: K\u1ebb n\u00e9t \u0111\u1ee9t cho AD, DC, FD v\u00ec \u0111\u00e2y l\u00e0 nh\u1eefng \u0111o\u1ea1n b\u1ecb l\u1ea5p.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-3.jpg\" alt=\"C\u00e1ch v\u1ebd h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u01a1n gi\u1ea3n. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Cac_dang_bai_tap_thuong_gap_ve_hinh_lap_phuong_bac_tieu_hoc\"><\/span>C\u00e1c d\u1ea1ng b\u00e0i t\u1eadp th\u01b0\u1eddng g\u1eb7p v\u1ec1 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng b\u1eadc ti\u1ec3u h\u1ecdc<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ed1i v\u1edbi ki\u1ebfn th\u1ee9c v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng, \u0111a ph\u1ea7n s\u1ebd \u0111\u01b0\u1ee3c h\u1ecdc t\u1eeb c\u1ea5p 1. Tuy nhi\u00ean, \u0111\u00e2y l\u00e0 giai \u0111o\u1ea1n m\u00e0 c\u00e1c b\u00e9 s\u1ebd m\u1edbi l\u00e0m quen v\u1edbi h\u00ecnh v\u00e0 ki\u1ebfn th\u1ee9c, n\u00ean c\u00e1c b\u00e0i t\u1eadp c\u0169ng mang t\u00ednh ch\u1ea5t c\u01a1 b\u1ea3n nh\u01b0 sau:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_1_Cong_thuc_%E2%80%93_dinh_nghia\"><\/span>D\u1ea1ng 1: C\u00f4ng th\u1ee9c \u2013 \u0111\u1ecbnh ngh\u0129a<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 d\u1ea1ng b\u00e0i t\u1eadp tr\u1eafc nghi\u1ec7m xu\u1ea5t hi\u1ec7n trong c\u00e1c \u0111\u1ec1 thi to\u00e1n m\u00e0 b\u00e9 s\u1ebd th\u01b0\u1eddng g\u1eb7p. V\u1edbi d\u1ea1ng to\u00e1n n\u00e0y th\u01b0\u1eddng s\u1ebd d\u1ef1a tr\u00ean c\u00e1c ki\u1ebfn th\u1ee9c \u0111\u1ecbnh ngh\u0129a, c\u00f4ng th\u1ee9c v\u1ec1 m\u1eb7t l\u00fd thuy\u1ebft \u0111\u1ec3 \u0111\u1eb7t c\u00e2u h\u1ecfi.<\/p>\n<p dir=\"ltr\">Ch\u00ednh v\u00ec v\u1eady, \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp n\u00e0y \u0111\u00f2i h\u1ecfi h\u1ecdc sinh ph\u1ea3i n\u1eafm ch\u1eafc l\u00fd thuy\u1ebft, ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u1ec3 \u0111\u01b0a ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c nh\u1ea5t.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: Nh\u1eadn \u0111\u1ecbnh n\u00e0o \u0111\u00fang khi n\u00f3i v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/em><\/p>\n<p dir=\"ltr\"><em>A. H\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 6 m\u1eb7t ph\u1eb3ng l\u00e0 h\u00ecnh vu\u00f4ng \u0111\u1ed1i x\u1ee9ng b\u1eb1ng nhau<\/em><\/p>\n<p dir=\"ltr\"><em>B. H\u00ecnh kh\u1ed1i c\u00f3 c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o kh\u00f4ng b\u1eb1ng nhau<\/em><\/p>\n<p dir=\"ltr\"><em>C. H\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 10 c\u1ea1nh b\u1eb1ng nhau<\/em><\/p>\n<p dir=\"ltr\"><em>D. C\u1ea3 A, B, C \u0111\u1ec1u sai<\/em><\/p>\n<p dir=\"ltr\"><em>==&gt; Theo \u0111\u1ecbnh ngh\u0129a, t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng s\u1ebd c\u00f3 6 m\u1eb7t ph\u1eb3ng l\u00e0 h\u00ecnh vu\u00f4ng \u0111\u1ed1i x\u1ee9ng b\u1eb1ng nhau, v\u1edbi 12 c\u1ea1nh b\u1eb1ng nhau c\u00f9ng c\u00e1c \u0111\u01b0\u1eddng ch\u00e9o b\u1eb1ng nhau. N\u00ean \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c nh\u1ea5t l\u00e0 A.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_2_Quan_sat_hinh_nhan_dien_do_vat_khoi_hop_chu_nhat_va_khoi_lap_phuong\"><\/span>D\u1ea1ng 2: Quan s\u00e1t h\u00ecnh, nh\u1eadn di\u1ec7n \u0111\u1ed3 v\u1eadt kh\u1ed1i h\u1ed9p ch\u1eef nh\u1eadt v\u00e0 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 m\u1ed9t trong nh\u1eefng b\u00e0i t\u1eadp c\u01a1 b\u1ea3n nh\u1ea5t \u0111\u1ec3 gia t\u0103ng kh\u1ea3 n\u0103ng nh\u1eadn bi\u1ebft, quan s\u00e1t c\u1ee7a b\u00e9 t\u1ed1t h\u01a1n. Th\u01b0\u1eddng \u0111\u1ec1 b\u00e0i s\u1ebd \u0111\u01b0a ra m\u1ed9t lo\u1ea1t c\u00e1c h\u00ecnh \u1ea3nh kh\u00e1c nhau v\u00e0 nh\u1eadn bi\u1ebft \u0111\u00e2u l\u00e0 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng.<\/p>\n<p dir=\"ltr\">V\u1edbi d\u1ea1ng b\u00e0i t\u1eadp n\u00e0y, nhi\u1ec1u em h\u1ecdc sinh th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn v\u1edbi h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt, n\u00ean y\u00eau c\u1ea7u c\u00e1c em ph\u1ea3i nh\u1eadn bi\u1ebft r\u00f5 c\u00e1c t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u1ec3 ch\u1ecdn \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: Trong c\u00e1c \u0111\u1ed3 v\u1eadt d\u01b0\u1edbi \u0111\u00e2y, h\u00ecnh n\u00e0o l\u00e0 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng.<\/em><\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-4.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\"><em>L\u1eddi gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>D\u1ef1a v\u00e0o \u0111\u1eb7c \u0111i\u1ec3m t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng s\u1ebd c\u00f3 6 m\u1eb7t l\u00e0 h\u00ecnh vu\u00f4ng b\u1eb1ng nhau, n\u00ean trong h\u00ecnh s\u1ebd c\u00f3 h\u1ed9p qu\u00e0 v\u00e0 vi\u00ean x\u00fac x\u1eafc l\u00e0 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_3_Dem_khoi_lap_phuong\"><\/span>D\u1ea1ng 3: \u0110\u1ebfm kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Khi l\u00e0m b\u00e0i t\u1eadp v\u1ec1 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng, c\u00e1c b\u00e9 s\u1ebd \u0111\u01b0\u1ee3c l\u00e0m quen v\u1edbi d\u1ea1ng b\u00e0i t\u1eadp \u0111\u1ebfm h\u00ecnh t\u01b0\u01a1ng \u1ee9ng. C\u00f3 ngh\u0129a b\u00e9 s\u1ebd nh\u00ecn v\u00e0o b\u1ee9c tranh v\u00e0 \u0111\u1ebfm xem c\u00f3 bao nhi\u00eau h\u00ecnh kh\u1ed1i.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5:<\/em><\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-5.jpg\" alt=\"\" width=\"100%\"><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_4_Ke_ten_do_vat_co_hinh_lap_phuong\"><\/span>D\u1ea1ng 4: K\u1ec3 t\u00ean \u0111\u1ed3 v\u1eadt c\u00f3 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y l\u00e0 m\u1ed9t d\u1ea1ng b\u00e0i t\u1eadp kh\u00e1 ph\u1ed5 bi\u1ebfn trong ch\u01b0\u01a1ng tr\u00ecnh to\u00e1n h\u1ecdc c\u1ea5p 1, \u0111\u1ec3 nh\u1eadn bi\u1ebft xem b\u00e9 c\u00f3 th\u1ef1c s\u1ef1 hi\u1ec3u r\u00f5 v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng hay kh\u00f4ng. V\u1eady n\u00ean, v\u1edbi d\u1ea1ng to\u00e1n n\u00e0y s\u1ebd bu\u1ed9c tr\u1ebb ph\u1ea3i t\u01b0 duy, suy ngh\u0129 v\u1ec1 h\u00ecnh d\u1ea1ng c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng trong th\u1ef1c t\u1ebf \u0111\u1ec3 \u0111\u01b0a ra \u0111\u00e1p \u00e1n ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: K\u1ec3 t\u00ean 5 \u0111\u1ed3 v\u1eadt c\u00f3 h\u00ecnh kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/em><\/p>\n<p dir=\"ltr\"><em>Gi\u1ea3i: H\u1ed9p qu\u00e0, rubik, gh\u1ebf \u0111\u00f4n h\u00ecnh vu\u00f4ng, b\u1ec3 c\u00e1 h\u00ecnh vu\u00f4ng, loa mini.<\/em><\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dang_5_Tinh_dien_tichchu_vithe_tich_khoi_lap_phuong\"><\/span>D\u1ea1ng 5: T\u00ednh di\u1ec7n t\u00edch\/chu vi\/th\u1ec3 t\u00edch kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u00e2y s\u1ebd l\u00e0 d\u1ea1ng b\u00e0i t\u1eadp v\u1ec1 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng n\u00e2ng cao h\u01a1n, khi \u0111\u1ec1 b\u00e0i s\u1ebd y\u00eau c\u1ea7u h\u1ecdc sinh t\u00ednh ch\u00ednh x\u00e1c di\u1ec7n t\u00edch, chu vi ho\u1eb7c th\u1ec3 t\u00ednh c\u1ee7a h\u00ecnh. V\u1eady n\u00ean, c\u00e1c em s\u1ebd ph\u1ea3i n\u1eafm r\u00f5 nh\u1eefng c\u00f4ng th\u1ee9c tr\u00ean \u0111\u1ec3 gi\u1ea3i b\u00e0i t\u1eadp ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\"><em>V\u00ed d\u1ee5: M\u1ed9t h\u00ecnh l\u1eadp ph\u01b0\u01a1ng A c\u00f3 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n l\u00e0 384 cm\u00b2. H\u1ecfi h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u00f3 c\u00f3 th\u1ec3 t\u00edch bao nhi\u00eau?<\/em><\/p>\n<p dir=\"ltr\"><em>B\u00e0i gi\u1ea3i:<\/em><\/p>\n<p dir=\"ltr\"><em>Di\u1ec7n t\u00edch m\u1ed9t m\u1eb7t c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0: 384 : 6 = 64 cm\u00b2<\/em><\/p>\n<p dir=\"ltr\"><em>\u0110\u1ed9 d\u00e0i c\u1ea1nh c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0 8cm do 64 = 8 x 8.<\/em><\/p>\n<p dir=\"ltr\"><em>V\u1eady, th\u1ec3 t\u00edch c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u00e0 8 x 8 x 8 = 5126 cm\u00b3<\/em><\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Bi_quyet_giup_be_hoc_toan_hinh_lap_phuong_dat_hieu_qua_cao\"><\/span>B\u00ed quy\u1ebft gi\u00fap b\u00e9 h\u1ecdc to\u00e1n h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u1ea1t hi\u1ec7u qu\u1ea3 cao<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">B\u1edfi c\u00e1c b\u00e9 c\u1ea5p 1 th\u01b0\u1eddng s\u1ebd m\u1edbi ch\u1ec9 l\u00e0m quen v\u1edbi nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng, nh\u01b0ng \u0111\u00f3 ch\u00ednh l\u00e0 n\u1ec1n t\u1ea3ng \u0111\u1ec3 h\u1ecdc c\u00e1c ki\u1ebfn th\u1ee9c n\u00e2ng cao h\u01a1n. V\u1eady n\u00ean, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00ed quy\u1ebft gi\u00fap n\u00e2ng cao hi\u1ec7u qu\u1ea3 h\u1ecdc t\u1eadp cho b\u00e9 m\u00e0 b\u1ed1 m\u1eb9 c\u00f3 th\u1ec3 \u00e1p d\u1ee5ng th\u00eam:<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Xay_dung_nen_tang_hoc_toan_vung_chac_cho_be_cung_Shining_Home_%E2%80%93_Gia_dinh_Anh_Ngu_Math\"><\/span>X\u00e2y d\u1ef1ng n\u1ec1n t\u1ea3ng h\u1ecdc to\u00e1n v\u1eefng ch\u1eafc cho b\u00e9 c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math l\u00e0 \u1ee9ng d\u1ee5ng h\u1ecdc to\u00e1n ti\u1ebfng Anh t\u01b0 duy d\u00e0nh cho \u0111\u1ed1i t\u01b0\u1ee3ng tr\u1ebb m\u1ea7m non, ti\u1ec3u h\u1ecdc \u0111ang \u0111\u01b0\u1ee3c nhi\u1ec1u ph\u1ee5 huynh l\u1ef1a ch\u1ecdn. B\u1edfi v\u00ec \u0111\u00e2y l\u00e0 \u0111\u1ed9 tu\u1ed5i b\u1eaft \u0111\u1ea7u ph\u00e1t tri\u1ec3n v\u00e0 h\u00ecnh th\u00e0nh t\u01b0 duy, n\u00ean trang b\u1ecb cho b\u00e9 ki\u1ebfn th\u1ee9c giai \u0111o\u1ea1n n\u00e0y s\u1ebd t\u1ea1o \u0111\u01b0\u1ee3c n\u1ec1n t\u1ea3ng to\u00e1n h\u1ecdc v\u1eefng ch\u1eafc cho b\u00e9 hi\u1ec7u qu\u1ea3.<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-6.jpg\" alt=\"H\u1ecdc to\u00e1n theo ph\u01b0\u01a1ng ph\u00e1p t\u00edch c\u1ef1c v\u1edbi Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef Math. (\u1ea2nh: Shining Home - Gia \u0111\u00ecnh Anh Ng\u1eef)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">\u0110\u1eb7c bi\u1ec7t, v\u1edbi ph\u01b0\u01a1ng ph\u00e1p d\u1ea1y h\u1ecdc t\u00edch c\u1ef1c, gi\u00fap b\u00e9 c\u00f3 s\u1ef1 h\u1ee9ng th\u00fa khi h\u1ecdc t\u1eadp, hi\u1ec3u \u0111\u01b0\u1ee3c g\u1ed1c r\u1ec5 b\u00e0i to\u00e1n v\u00e0 t\u1ef1 t\u01b0 duy gi\u1ea3i quy\u1ebft b\u00e0i t\u1eadp. N\u00ean trong qu\u00e1 tr\u00ecnh h\u1ecdc c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd gi\u00fap b\u00e9:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Ph\u00e1t tri\u1ec3n t\u01b0 duy v\u00e0 tr\u00ed th\u00f4ng minh trong th\u1eddi k\u1ef3 v\u00e0ng c\u1ee7a n\u00e3o b\u1ed9<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Gi\u00fap tr\u1ebb ph\u00e1t tri\u1ec3n \u0111\u1ed3ng b\u1ed9 t\u01b0 duy v\u1ec1 To\u00e1n v\u00e0 c\u1ea3 ti\u1ebfng Anh<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Ngo\u00e0i ra, Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math c\u00f2n cung c\u1ea5p cho b\u00e9:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">60+ ch\u1ee7 \u0111\u1ec1 to\u00e1n h\u1ecdc d\u1ef1a tr\u00ean 7 chuy\u00ean \u0111\u1ec1 to\u00e1n ch\u00ednh, c\u00f3 c\u1ea3 h\u00ecnh h\u1ecdc.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">V\u1edbi 4 c\u1ea5p \u0111\u1ed9 t\u1eeb d\u1ec5 \u0111\u1ebfn kh\u00f3 (Bao g\u1ed3m 400+ b\u00e0i h\u1ecdc chuy\u00ean s\u00e2u)<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">V\u00e0 h\u01a1n 10.000+ ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c l\u00e0m t\u0103ng h\u1ee9ng th\u00fa v\u00e0 vui th\u00edch khi h\u1ecdc\u00a0<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">Khi tham gia kh\u00f3a h\u1ecdc, b\u00e9 s\u1ebd \u0111\u01b0\u1ee3c h\u01b0\u1edbng d\u1eabn h\u1ecdc t\u1eeb nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n cho \u0111\u1ebfn n\u00e2ng cao m\u1ed9t c\u00e1ch b\u00e0i b\u1ea3n, chuy\u00ean s\u00e2u. \u0110\u1eb7c bi\u1ec7t, v\u1edbi vi\u1ec7c k\u1ebft h\u1ee3p c\u00f9ng nh\u1eefng ho\u1ea1t \u0111\u1ed9ng t\u01b0\u01a1ng t\u00e1c nh\u01b0 ch\u01a1i tr\u00f2 ch\u01a1i, gi\u1ea3i c\u00e2u \u0111\u1ed1,\u2026 s\u1ebd tr\u00e1nh g\u00e2y nh\u00e0m ch\u00e1n v\u1edbi c\u00e1c b\u00e9.\u00a0<\/p>\n<p dir=\"ltr\">Cam k\u1ebft, v\u1edbi Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math s\u1ebd gi\u00fap b\u00e9 c\u00f3 \u0111\u01b0\u1ee3c nh\u1eefng gi\u1edd h\u1ecdc to\u00e1n vui v\u1ebb, h\u1ee9ng th\u00fa v\u00e0 hi\u1ec7u qu\u1ea3 h\u01a1n r\u1ea5t nhi\u1ec1u.<\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i Android<\/p>\n<p dir=\"ltr\">T\u1ea3i Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef Math cho \u0111i\u1ec7n tho\u1ea1i iOS<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Dam_bao_be_nam_vung_kien_thuc_ve_khoi_lap_phuong\"><\/span>\u0110\u1ea3m b\u1ea3o b\u00e9 n\u1eafm v\u1eefng ki\u1ebfn th\u1ee9c v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">\u0110\u1ec3 chinh ph\u1ee5c \u0111\u01b0\u1ee3c c\u00e1c b\u00e0i t\u1eadp v\u1ec1 h\u00ecnh l\u1eadp ph\u01b0\u01a1ng, \u0111\u00f2i h\u1ecfi b\u00e9 ph\u1ea3i n\u1eafm v\u1eefng l\u00fd thuy\u1ebft c\u1ee7a ki\u1ebfn th\u1ee9c n\u00e0y t\u1eeb c\u00f4ng th\u1ee9c, \u0111\u1ecbnh ngh\u0129a, \u0111\u1eb7c \u0111i\u1ec3m, t\u00ednh ch\u1ea5t, c\u00e1c d\u1ea1ng b\u00e0i t\u1eadp\u2026<\/p>\n<p dir=\"ltr\">B\u1edfi v\u00ec ch\u1ec9 khi con n\u1eafm v\u1eefng th\u00ec m\u1edbi ch\u1eafc ch\u1eafn b\u00e9 hi\u1ec3u b\u00e0i t\u1eadp v\u00e0 gi\u1ea3i ch\u00fang m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c.<\/p>\n<p dir=\"ltr\">V\u1eady n\u00ean, b\u1ed1 m\u1eb9 h\u00e3y th\u01b0\u1eddng xuy\u00ean \u0111\u1eb7t ra c\u00e1c c\u00e2u h\u1ecfi, ki\u1ec3m tra s\u00e1ch v\u1edf c\u1ee7a b\u00e9,\u2026 \u0111\u1ec3 xem b\u00e9 c\u00f3 ghi nh\u1edb hay hi\u1ec3u v\u1ec1 h\u00ecnh n\u00e0y kh\u00f4ng. \u0110\u1ec3 t\u1eeb \u0111\u00f3 c\u1ee7ng c\u1ed1 nh\u1eefng ki\u1ebfn th\u1ee9c b\u00e9 c\u00f2n y\u1ebfu k\u1ecbp th\u1eddi, tr\u00e1nh b\u1ecb d\u1ed3n nhi\u1ec1u l\u00fd thuy\u1ebft con s\u1ebd kh\u00f3 ti\u1ebfp thu.<\/p>\n<h3 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Thuc_hanh_nhieu_hon_la_dieu_khong_the_thieu\"><\/span>Th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n l\u00e0 \u0111i\u1ec1u kh\u00f4ng th\u1ec3 thi\u1ebfu<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p dir=\"ltr\">B\u00ean c\u1ea1nh vi\u1ec7c h\u1ecdc v\u00e0 n\u1eafm ch\u1eafc l\u00fd thuy\u1ebft, b\u1ed1 m\u1eb9 h\u00e3y t\u1ea1o \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 b\u00e9 \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh, luy\u1ec7n t\u1eadp nhi\u1ec1u h\u01a1n th\u00f4ng qua vi\u1ec7c: L\u00e0m nhi\u1ec1u b\u00e0i t\u1eadp, \u1ee9ng d\u1ee5ng h\u1ecdc t\u1eadp trong th\u1ef1c ti\u1ec5n, t\u1ed5 ch\u1ee9c c\u00e1c tr\u00f2 ch\u01a1i li\u00ean quan t\u1edbi kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng cho b\u00e9 tham gia,\u2026<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-7.jpg\" alt=\"C\u00f9ng b\u00e9 th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n r\u1ea5t quan tr\u1ecdng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">Vi\u1ec7c \u0111\u01b0\u1ee3c th\u1ef1c h\u00e0nh th\u01b0\u1eddng xuy\u00ean s\u1ebd gi\u00fap b\u00e9 hi\u1ec3u v\u00e0 ghi nh\u1edb ki\u1ebfn th\u1ee9c t\u1ed1t h\u01a1n. \u0110\u1ed3ng th\u1eddi, \u0111\u00e2y c\u0169ng l\u00e0 ph\u01b0\u01a1ng ph\u00e1p gi\u00fap b\u00e9 gia t\u0103ng s\u1ef1 h\u1ee9ng th\u00fa h\u1ecdc t\u1eadp hi\u1ec7u qu\u1ea3.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Mot_so_luu_y_khi_day_be_hoc_hinh_lap_phuong\"><\/span>M\u1ed9t s\u1ed1 l\u01b0u \u00fd khi d\u1ea1y b\u00e9 h\u1ecdc h\u00ecnh l\u1eadp ph\u01b0\u01a1ng<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">\u0110\u1ec3 n\u00e2ng cao hi\u1ec7u qu\u1ea3 khi d\u1ea1y b\u00e9 h\u1ecdc v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng, b\u1ed1 m\u1eb9 c\u1ea7n l\u01b0u \u00fd m\u1ed9t s\u1ed1 v\u1ea5n \u0111\u1ec1 sau:<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u1ed1 m\u1eb9 c\u1ea7n gi\u1ea3i th\u00edch r\u00f5 cho b\u00e9 v\u1ec1 \u0111\u1eb7c \u0111i\u1ec3m, t\u00ednh ch\u1ea5t c\u1ee7a h\u00ecnh kh\u1ed1i n\u00e0y.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Tr\u1ebb th\u01b0\u1eddng b\u1ecb nh\u1ea7m l\u1eabn h\u00ecnh l\u1eadp ph\u01b0\u01a1ng v\u1edbi h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt, n\u00ean b\u1ed1 m\u1eb9 h\u00e3y ch\u1ec9 cho b\u00e9 s\u1ef1 kh\u00e1c bi\u1ec7t \u0111\u1ec3 nh\u1eadn bi\u1ebft ch\u00fang.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">B\u1ed1 m\u1eb9 n\u00ean cho b\u00e9 h\u1ecdc th\u00f4ng qua tr\u00f2 ch\u01a1i s\u1ebd gi\u00fap con ti\u1ebfp thu ki\u1ebfn th\u1ee9c t\u1ef1 nhi\u00ean, hi\u1ec7u qu\u1ea3 h\u01a1n.<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">L\u1ea5y v\u00ed d\u1ee5 th\u1ef1c ti\u1ec5n v\u1edbi c\u00e1c \u0111\u1ed3 v\u1eadt, v\u1eadt th\u1ec3 gi\u1ed1ng h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u1ec3 b\u00e9 d\u1ec5 h\u00ecnh dung v\u00e0 ti\u1ebfp thu b\u00e0i h\u1ecdc.<\/p>\n<\/li>\n<\/ul>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"H2_Mot_so_bai_tap_ve_khoi_lap_phuong_de_be_tu_luyen\"><\/span>H2: M\u1ed9t s\u1ed1 b\u00e0i t\u1eadp v\u1ec1 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng \u0111\u1ec3 b\u00e9 t\u1ef1 luy\u1ec7n<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p dir=\"ltr\">Sau khi \u0111\u00e3 n\u1eafm ch\u1eafc l\u00fd thuy\u1ebft, d\u01b0\u1edbi \u0111\u00e2y l\u00e0 m\u1ed9t s\u1ed1 b\u00e0i t\u1eadp \u0111\u1ec3 b\u00e9 c\u00f9ng luy\u1ec7n t\u1eadp:<\/p>\n<p dir=\"ltr\">C\u00e2u 1:<\/p>\n<p dir=\"ltr\">H\u00ecnh l\u1eadp ph\u01b0\u01a1ng A c\u00f3 c\u1ea1nh 4 cm. H\u00ecnh l\u1eadp ph\u01b0\u01a1ng B c\u00f3 c\u1ea1nh g\u1ea5p 2 l\u1ea7n c\u1ea1nh h\u00ecnh l\u1eadp ph\u01b0\u01a1ng A.<\/p>\n<p dir=\"ltr\">H\u1ecfi th\u1ec3 t\u00edch h\u00ecnh l\u1eadp ph\u01b0\u01a1ng B g\u1ea5p bao nhi\u00eau l\u1ea7n th\u1ec3 t\u00edch h\u00ecnh l\u1eadp ph\u01b0\u01a1ng A.<\/p>\n<p dir=\"ltr\">C\u00e2u 2: M\u1ed9t kh\u1ed1i kim lo\u1ea1i h\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 c\u1ea1nh 1\/5 m. M\u1ed7i x\u0103ng \u2013 ti-m\u00e9t kh\u1ed1i kim n\u1eb7ng 6,2 g. H\u1ecfi kh\u1ed1i kim lo\u1ea1i \u0111\u00f3 c\u00e2n n\u1eb7ng bao nhi\u00eau ki-l\u00f4-gam?<\/p>\n<p dir=\"ltr\">C\u00e2u 3: M\u1ed9t h\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n l\u00e0 294 cm\u00b2. H\u1ecfi h\u00ecnh l\u1eadp ph\u01b0\u01a1ng \u0111\u00f3 c\u00f3 th\u1ec3 t\u00edch bao nhi\u00eau?<\/p>\n<p dir=\"ltr\">C\u00e2u 4: M\u1ed9t h\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 c\u1ea1nh 7 cm. N\u1ebfu c\u1ea1nh c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng t\u0103ng l\u00ean 4 l\u1ea7n. H\u1ecfi:<\/p>\n<p dir=\"ltr\">a) Di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n c\u1ee7a h\u00ecnh l\u1eadp ph\u01b0\u01a1ng t\u0103ng l\u00ean m\u1ea5y l\u1ea7n?<\/p>\n<p dir=\"ltr\">b) Th\u1ec3 t\u00edch h\u00ecnh l\u1eadp ph\u01b0\u01a1ng t\u0103ng l\u00ean m\u1ea5y l\u1ea7n?<\/p>\n<p dir=\"ltr\">C\u00e2u 5: Ph\u1ea3i x\u1ebfp bao nhi\u00eau h\u00ecnh l\u1eadp ph\u01b0\u01a1ng nh\u1ecf c\u00f3 c\u1ea1nh 1cm \u0111\u1ec3 \u0111\u01b0\u1ee3c m\u1ed9t h\u00ecnh l\u1eadp ph\u01b0\u01a1ng l\u1edbn c\u00f3 di\u1ec7n t\u00edch to\u00e0n ph\u1ea7n l\u00e0 294dm\u00b2<\/p>\n<p dir=\"ltr\">C\u00e2u 6: M\u1ed9t b\u1ec3 k\u00ednh h\u00ecnh h\u1ed9p ch\u1eef nh\u1eadt c\u00f3 di\u1ec7n t\u00edch \u0111\u00e1y l\u00e0 250cm\u00b2 v\u00e0 b\u1ec3 \u0111ang ch\u1ee9a n\u01b0\u1edbc. T\u00ednh chi\u1ec1u cao m\u1ef1c n\u01b0\u1edbc, bi\u1ebft r\u1eb1ng n\u1ebfu cho m\u1ed9t kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng b\u1eb1ng kim lo\u1ea1i c\u1ea1nh 10cm v\u00e0o b\u1ec3 th\u00ec kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng v\u1eeba v\u1eb7n ng\u1eadp trong n\u01b0\u1edbc (\u0111\u00e1y tr\u00ean kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng b\u1eb1ng m\u1eb7t n\u01b0\u1edbc).<\/p>\n<p dir=\"ltr\">C\u00e2u 7. Ng\u01b0\u1eddi ta l\u00e0m m\u1ed9t c\u00e1i l\u1ed3ng s\u1eaft h\u00ecnh l\u1eadp ph\u01b0\u01a1ng c\u00f3 \u0111\u1ed9 d\u00e0i m\u1ed7i c\u1ea1nh l\u00e0 25dm. C\u00fa m\u1ed7i m\u00e9t vu\u00f4ng s\u1eaft gi\u00e1 45000 \u0111\u1ed3ng. H\u1ecfi ng\u01b0\u1eddi ta l\u00e0m c\u00e1i l\u1ed3ng s\u1eaft \u0111\u00f3 h\u1ebft bao nhi\u00eau ti\u1ec1n mua s\u1eaft?<\/p>\n<p dir=\"ltr\">C\u00e2u 8. B\u00e1c B\u00ecnh c\u1ea7n l\u00e0m 2 c\u00e1i th\u00f9ng h\u00ecnh l\u1eadp ph\u01b0\u01a1ng b\u1eb1ng s\u1eaft kh\u00f4ng c\u00f3 n\u1eafp c\u1ea1nh 1,8 m . H\u1ecfi B\u00e1c s\u01a1n c\u1ea3 b\u00ean trong v\u00e0 b\u00ean ngo\u00e0i 2 c\u00e1i th\u00f9ng \u0111\u00f3 th\u00ec ph\u1ea3i mua bao nhi\u00eau ki-l\u00f4-gam s\u01a1n, bi\u1ebft r\u1eb1ng c\u1ee9 20 m2 th\u00ec c\u1ea7n 5 kg s\u01a1n.<\/p>\n<p dir=\"ltr\">C\u00e2u 9:<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-8.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e2u 10:\u00a0<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-9a.jpg\" alt=\"C\u00f9ng b\u00e9 th\u1ef1c h\u00e0nh nhi\u1ec1u h\u01a1n r\u1ea5t quan tr\u1ecdng. (\u1ea2nh: S\u01b0u t\u1ea7m internet)\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e2u 11: Vi\u1ebft v\u00e0o ch\u1ed7 ch\u1ea5m<\/p>\n<ul>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Kh\u1ed1i ru-b\u00edc c\u00f3 d\u1ea1ng kh\u1ed1i &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">Qu\u1ea3 b\u00f3ng c\u00f3 d\u1ea1ng kh\u1ed1i &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u1ed9p b\u00fat c\u00f3 d\u1ea1ng kh\u1ed1i &#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;&#8230;<\/p>\n<\/li>\n<li dir=\"ltr\">\n<p dir=\"ltr\" role=\"presentation\">H\u1ed9p keo d\u00e1n c\u00f3 d\u1ea1ng kh\u1ed1i &#8230;&#8230;&#8230;&#8230;&#8230;..<\/p>\n<\/li>\n<\/ul>\n<p dir=\"ltr\">C\u00e2u 12: H\u00ecnh n\u00e0o sau \u0111\u00e2y l\u00e0 kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-10.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e2u 13: M\u1ed7i v\u1eadt sau c\u00f3 d\u1ea1ng kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng hay kh\u1ed1i h\u1ed9p ch\u1eef nh\u1eadt?<\/p>\n<p dir=\"ltr\"><img decoding=\"async\" class=\"lazyload\" src=\"https:\/\/external-content.duckduckgo.com\/iu\/?u=https:\/\/vnmedia2.monkeyuni.net\/upload\/web\/img\/khoi-lap-phuong-11.jpg\" alt=\"\" width=\"100%\"><\/p>\n<p dir=\"ltr\">C\u00e2u 14: K\u1ec3 t\u00ean c\u00e1c \u0111\u1ed3 v\u1eadt trong th\u1ef1c t\u1ebf:<\/p>\n<p dir=\"ltr\">a, C\u00f3 d\u1ea1ng kh\u1ed1i h\u1ed9p ch\u1eef nh\u1eadt.<\/p>\n<p dir=\"ltr\">b, C\u00f3 d\u1ea1ng kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng.<\/p>\n<h2 dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Ket_luan\"><\/span>K\u1ebft lu\u1eadn<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/p>\n<p dir=\"ltr\">Tr\u00ean \u0111\u00e2y l\u00e0 nh\u1eefng th\u00f4ng tin v\u1ec1 ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng. \u0110\u00e2y l\u00e0 m\u1ed9t h\u00ecnh kh\u1ed1i kh\u00e1 kh\u00f3, n\u00ean \u0111\u00f2i h\u1ecfi b\u1ed1 m\u1eb9 c\u1ea7n \u0111\u1ed3ng h\u00e0nh \u0111\u1ec3 gi\u00fap b\u00e9 hi\u1ec3u, ghi nh\u1edb v\u00e0 th\u1ef1c h\u00e0nh hi\u1ec7u qu\u1ea3. Hy v\u1ecdng v\u1edbi nh\u1eefng ki\u1ebfn th\u1ee9c v\u00e0 b\u00ed quy\u1ebft m\u00e0 Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef chia s\u1ebb s\u1ebd gi\u00fap \u00edch \u0111\u01b0\u1ee3c cho c\u00f4ng cu\u1ed9c d\u1ea1y b\u00e9 h\u1ecdc h\u00ecnh kh\u1ed1i n\u00e0y t\u1ed1t nh\u1ea5t.<\/p>\n<p>                                    Ngu\u1ed3n tham kh\u1ea3o<\/p>\n<p>Cube<\/p>\n<p>https:\/\/byjus.com\/maths\/cube\/<\/p>\n<p>Cube<\/p>\n<p>https:\/\/www.cuemath.com\/measurement\/cube\/<\/p>\n<p>Ngu\u1ed3n: <a href=\"http:\/\/www.ckconitsha.com\/vn\/\">http:\/\/www.ckconitsha.com\/vn\/<\/a> T\u00e1c gi\u1ea3: <a href=\"https:\/\/www.ckconitsha.com\/vn\/author\/nguyenlandung\">Nguy\u1ec5n L\u00e2n d\u0169ng<\/a><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Kh\u1ed1i l\u1eadp ph\u01b0\u01a1ng l\u00e0 m\u1ed9t trong nh\u1eefng ki\u1ebfn th\u1ee9c h\u00ecnh h\u1ecdc m\u00e0 t\u1eeb c\u1ea5p 1 h\u1ecdc sinh \u0111\u00e3 \u0111\u01b0\u1ee3c l\u00e0m quen. \u0110\u1ec3 gi\u00fap c\u00e1c em hi\u1ec3u r\u00f5 h\u01a1n v\u1ec1 th\u1ec3 lo\u1ea1i h\u00ecnh h\u1ecdc n\u00e0y, c\u0169ng nh\u01b0 n\u1eafm \u0111\u01b0\u1ee3c nh\u1eefng ki\u1ebfn th\u1ee9c c\u01a1 b\u1ea3n nh\u1ea5t v\u1ec1 h\u00ecnh, h\u00e3y c\u00f9ng Shining Home &#8211; Gia \u0111\u00ecnh Anh Ng\u1eef&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[100],"tags":[],"class_list":["post-17867","post","type-post","status-publish","format-standard","hentry","category-kien-thuc"],"_links":{"self":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17867","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/comments?post=17867"}],"version-history":[{"count":2,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17867\/revisions"}],"predecessor-version":[{"id":24119,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/posts\/17867\/revisions\/24119"}],"wp:attachment":[{"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/media?parent=17867"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/categories?post=17867"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.ckconitsha.com\/vn\/wp-json\/wp\/v2\/tags?post=17867"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}