{"id":1247,"date":"2020-04-15T07:00:00","date_gmt":"2020-04-15T00:00:00","guid":{"rendered":"https:\/\/www.truyenthong.edu.vn\/?p=1247"},"modified":"2025-05-20T10:25:59","modified_gmt":"2025-05-20T10:25:59","slug":"chung-minh-bat-dang-thuc-bang-hinh-hoc","status":"publish","type":"post","link":"https:\/\/truyenthong.edu.vn\/sanpham\/2020\/04\/15\/chung-minh-bat-dang-thuc-bang-hinh-hoc\/","title":{"rendered":"Ch\u1ee9ng minh b\u1ea5t \u0111\u1eb3ng th\u1ee9c b\u1eb1ng h\u00ecnh h\u1ecdc"},"content":{"rendered":"\n<p>Khi ch\u1ee9ng minh b\u1ea5t \u0111\u1eb3ng th\u1ee9c b\u1eb1ng h\u00ecnh h\u1ecdc ng\u01b0\u1eddi ta hay s\u1eed d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t h\u00ecnh h\u1ecdc sau \u0111\u00e2y: <\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Trong t\u1ea5t c\u1ea3 c\u00e1c \u0111\u01b0\u1eddng g\u1ea5p kh\u00fac n\u1ed1i hai \u0111i\u1ec3m $A, B$; \u0111\u01b0\u1eddng th\u1eb3ng n\u1ed1i $AB$ l\u00e0 \u0111\u01b0\u1eddng c\u00f3 \u0111\u1ed9 d\u00e0i b\u00e9 nh\u1ea5t. <\/li>\n\n\n\n<li>Trong m\u1ed9t tam gi\u00e1c t\u1ed5ng \u0111\u1ed9 d\u00e0i hai c\u1ea1nh b\u1ea5t k\u1ef3 lu\u00f4n l\u1edbn h\u01a1n \u0111\u1ed9 d\u00e0i c\u1ea1nh c\u00f2n l\u1ea1i. <\/li>\n\n\n\n<li>Cho \u0111i\u1ec3m $M$ ngo\u00e0i \u0111\u01b0\u1eddng th\u1eb3ng $\\Delta$ cho tr\u01b0\u1edbc, khi \u0111\u00f3 \u0111\u1ed9 d\u00e0i \u0111\u01b0\u1eddng vu\u00f4ng g\u00f3c k\u1ebb t\u1eeb $M$ xu\u1ed1ng $\\Delta$ ng\u1eafn h\u01a1n m\u1ecdi \u0111\u01b0\u1eddng xi\u00ean k\u1ebb t\u1eeb $M$ xu\u1ed1ng \u0111\u01b0\u1eddng th\u1eb3ng \u1ea5y. <\/li>\n<\/ul>\n\n\n<div class=\"wp-block-image\">\n<figure class=\"aligncenter size-large is-resized\"><img decoding=\"async\" src=\"https:\/\/www.truyenthong.edu.vn\/apps\/giml\/images\/image.php?file=1Ix-cNoqSqpyD5f4GczEwQyfYMV4OpO6j\" alt=\"\" style=\"aspect-ratio:1.2307692307692308;width:405px;height:auto\"\/><figcaption class=\"wp-element-caption\">Ch\u1ee9ng minh b\u1ea5t \u0111\u1eb3ng th\u1ee9c b\u1eb1ng h\u00ecnh h\u1ecdc<\/figcaption><\/figure>\n<\/div>\n\n\n<!--more-->\n\n\n\n<p>Th\u00f4ng tin v\u1ec1 s\u1ea3n ph\u1ea9m:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>H\u1ecdc ph\u1ea7n: Nghi\u1ec7p v\u1ee5 s\u01b0 ph\u1ea1m m\u00f4n To\u00e1n<\/li>\n\n\n\n<li>N\u0103m: 2010<\/li>\n\n\n\n<li>T\u00e1c gi\u1ea3: L\u00ea Th\u1ecb Minh L\u1ec7, Ng\u00f4 Quang B\u1ea3o Ng\u1ecdc, Tr\u1ecbnh Th\u1ecb M\u1ef9 Ng\u00e2n, Phan Th\u1ecb Thanh Nga<\/li>\n\n\n\n<li>T\u1ea3i v\u1ec1 (ppt, doc):\u00a0<a href=\"https:\/\/drive.google.com\/file\/d\/1gdRhU8H41rfQPz0zTIKdO-DVEx5gULwV\/view?usp=sharing\">B\u00e1o c\u00e1o PPT<\/a>, <a href=\"https:\/\/drive.google.com\/file\/d\/1mcSX0EsVu85t4ifmSYFY37QRYxbRm5Qn\/view?usp=sharing\">b\u1ea3n Word<\/a><\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Khi ch\u1ee9ng minh b\u1ea5t \u0111\u1eb3ng th\u1ee9c b\u1eb1ng h\u00ecnh h\u1ecdc ng\u01b0\u1eddi ta hay s\u1eed d\u1ee5ng c\u00e1c t\u00ednh ch\u1ea5t h\u00ecnh h\u1ecdc sau \u0111\u00e2y:<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[23,80],"class_list":["post-1247","post","type-post","status-publish","format-standard","hentry","category-nghiep-vu-su-pham-mon-toan","tag-bat-dang-thuc","tag-hinh-hoc-phang"],"_links":{"self":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/1247","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/comments?post=1247"}],"version-history":[{"count":1,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/1247\/revisions"}],"predecessor-version":[{"id":3530,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/posts\/1247\/revisions\/3530"}],"wp:attachment":[{"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/media?parent=1247"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/categories?post=1247"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/truyenthong.edu.vn\/sanpham\/wp-json\/wp\/v2\/tags?post=1247"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}