{"id":168,"count":6,"description":"Th\u00f4ng th\u01b0\u1eddng ng\u01b0\u1eddi ta s\u1eed d\u1ee5ng m\u1ed9t khu\u00f4n \u0111\u1eb7c bi\u1ec7t \u0111\u1ec3 \u0111\u1ea3m b\u1ea3o r\u1eb1ng c\u00e1c bi \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp m\u1ed9t c\u00e1ch ch\u00ednh x\u00e1c v\u00e0 \u0111\u1ec1u nhau. Khu\u00f4n th\u01b0\u1eddng c\u00f3 h\u00ecnh tam gi\u00e1c v\u00e0 c\u00f3 th\u1ec3 \u0111i\u1ec1u ch\u1ec9nh k\u00edch th\u01b0\u1edbc \u0111\u1ec3 ph\u00f9 h\u1ee3p v\u1edbi lo\u1ea1i tr\u00f2 ch\u01a1i c\u1ee5 th\u1ec3.\r\n\r\nKhu\u00f4n tam gi\u00e1c n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u01a1n thu\u1ea7n l\u00e0 m\u1ed9t c\u1ea5u tr\u00fac h\u00ecnh h\u1ecdc, m\u00e0 c\u00f2n l\u00e0 m\u1ed9t t\u00e1c ph\u1ea9m ngh\u1ec7 thu\u1eadt s\u1ed1ng \u0111\u1ed9ng \u0111\u01b0\u1ee3c t\u1ea1o n\u00ean t\u1eeb s\u1ef1 s\u1eafp x\u1ebfp t\u1ef7 m\u1ec9 c\u1ee7a c\u00e1c bi bida m\u00e0u s\u1eafc kh\u00e1c nhau. \u0110i\u1ec1u \u0111\u1eb7c bi\u1ec7t l\u00e0 ch\u00fang \u0111\u01b0\u1ee3c x\u1ebfp th\u00e0nh m\u1ed9t h\u00ecnh tam gi\u00e1c ho\u00e0n h\u1ea3o.\r\n\r\nM\u1ed7i chi\u1ebfc bi bida trong tam gi\u00e1c n\u00e0y kh\u00f4ng ch\u1ec9 \u0111\u00f3ng vai tr\u00f2 l\u00e0 m\u1ed9t ph\u1ea7n c\u1ee7a tr\u00f2 ch\u01a1i m\u00e0 c\u00f2n l\u00e0 c\u00e1c vi\u00ean \"vi\u00ean ng\u1ecdc\" \u0111\u01b0\u1ee3c s\u1eafp x\u1ebfp theo m\u1ed9t c\u00e1ch h\u00e0i h\u00f2a v\u00e0 t\u1ea1o n\u00ean m\u1ed9t ki\u1ec7t t\u00e1c kh\u00f4ng th\u1ec3 b\u1ecf qua. S\u1ef1 k\u1ebft h\u1ee3p gi\u1eefa m\u00e0u s\u1eafc s\u00e1ng t\u1ea1o v\u00e0 \u0111\u1ed1i l\u1eadp t\u1ea1o n\u00ean m\u1ed9t hi\u1ec7u \u1ee9ng th\u1ecb gi\u00e1c \u0111\u1ed9c \u0111\u00e1o. Khi\u1ebfn cho ng\u01b0\u1eddi quan s\u00e1t kh\u00f4ng th\u1ec3 nh\u1eadn di\u1ec7n \u0111\u01b0\u1ee3c bi\u00ean gi\u1edbi gi\u1eefa t\u1eebng vi\u00ean bi.\r\n

Li\u00ean h\u1ec7 Th\u1ebf gi\u1edbi bida:<\/strong><\/h3>\r\n