{"common":{"save":0,"post_id":"842","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"2221","post_id":"842","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n s\u1ed1 ho\u1eb7c ch\u1eef th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 ho\u1eb7c ch\u1eef th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["B"],["C"],["4"]]],"list":[{"point":10,"width":60,"type_input":"","ques":"<span class='basic_left'>V\u1ebd tam gi\u00e1c ABC, bi\u1ebft ba c\u1ea1nh BC = 7cm, AB = 5cm, AC = 4cm.<br\/><b>C\u00e1ch v\u1ebd:<\/b><br\/>+ V\u1ebd \u0111o\u1ea1n th\u1eb3ng BC = 7cm<br\/>+ V\u1ebd cung tr\u00f2n t\u00e2m _input_, b\u00e1n k\u00ednh 5cm<br\/>+ V\u1ebd cung tr\u00f2n t\u00e2m _input_, b\u00e1n k\u00ednh _input_cm.<br\/>+ L\u1ea5y m\u1ed9t giao \u0111i\u1ec3m c\u1ee7a hai cung tr\u00ean, g\u1ecdi giao \u0111i\u1ec3m \u0111\u00f3 l\u00e0 A<br\/>+ V\u1ebd \u0111o\u1ea1n th\u1eb3ng AB, AC, ta c\u00f3 $\\triangle$ABC.<\/span>","hint":"","explain":"<span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span><br\/><span class='basic_left'><center><img src='img\/H625_K101.png' \/><\/center><b>C\u00e1ch v\u1ebd:<\/b><br\/>+ V\u1ebd \u0111o\u1ea1n th\u1eb3ng BC = 7cm<br\/>+ V\u1ebd cung tr\u00f2n t\u00e2m B, b\u00e1n k\u00ednh 5cm<br\/>+ V\u1ebd cung tr\u00f2n t\u00e2m C, b\u00e1n k\u00ednh 4cm.<br\/>+ L\u1ea5y m\u1ed9t giao \u0111i\u1ec3m c\u1ee7a hai cung tr\u00ean, g\u1ecdi giao \u0111i\u1ec3m \u0111\u00f3 l\u00e0 A<br\/>+ V\u1ebd \u0111o\u1ea1n th\u1eb3ng AB, AC, ta c\u00f3 $\\triangle$ABC.<br\/>V\u1eady s\u1ed1 ho\u1eb7c ch\u1eef c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng theo th\u1ee9 t\u1ef1 t\u1eeb tr\u00ean xu\u1ed1ng d\u01b0\u1edbi, t\u1eeb tr\u00e1i sang ph\u1ea3i l\u00e0:<span class='basic_pink'> B, C, 4<\/span><\/span> <\/span> <br\/> "}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:59"},{"id":"2222","post_id":"842","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":14,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":10,"ques":"<center><img src='img\/H625_K103.png' \/><\/center> Cho h\u00ecnh v\u1ebd nh\u01b0 tr\u00ean, c\u00e1c \u0111i\u1ec3m c\u00e1ch \u0111\u1ec1u \u0111i\u1ec3m O l\u00e0:","select":["A. \u0110i\u1ec3m A v\u00e0 B","B. \u0110i\u1ec3m A v\u00e0 C","C. \u0110i\u1ec3m C, D","D. \u0110i\u1ec3m A, B, C, D"],"hint":"","explain":" <span class='basic_left'><center><img src='img\/H625_K103.png' \/><\/center> C\u00e1c \u0111i\u1ec3m A, B, C, D n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng tr\u00f2n t\u00e2m O, b\u00e1n k\u00ednh R n\u00ean OA = OB = OC = OD = R<br\/>Hay b\u1ed1n \u0111i\u1ec3m A, B, C, D c\u00e1ch \u0111\u1ec1u \u0111i\u1ec3m O.<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'>D. \u0110i\u1ec3m A, B, C, D<\/span><\/span>","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:59"},{"id":"2223","post_id":"842","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":14,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":10,"ques":"<center><img src='img\/H625_K104.png' \/><\/center> Cho h\u00ecnh v\u1ebd nh\u01b0 tr\u00ean, s\u1ed1 cung tr\u00f2n l\u00e0:","select":["A. 6 cung tr\u00f2n","B. 12 cung tr\u00f2n","C. 15 cung tr\u00f2n","D. 18 cung tr\u00f2n"],"hint":"","explain":" <span class='basic_left'><center><img src='img\/H625_K104.png' \/><\/center> C\u00e1c d\u00e2y cung c\u1ee7a \u0111\u01b0\u1eddng tr\u00f2n t\u00e2m O l\u00e0: AB, BC, CA<br\/>H\u00ecnh tr\u00ean c\u00f3 3 d\u00e2y cung n\u00ean s\u1ed1 cung tr\u00f2n l\u00e0: 3 . 2 = 6 (cung tr\u00f2n)<br\/>V\u1eady ta ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: <span class='basic_pink'> A. 6 cung tr\u00f2n<\/span><\/span><\/span><span class='basic_left'><span class='basic_green'>Nh\u1eadn x\u00e9t:<\/span><br\/>Cho n \u0111i\u1ec3m tr\u00ean \u0111\u01b0\u1eddng tr\u00f2n. V\u1ebd c\u00e1c d\u00e2y c\u00f3 hai \u0111\u1ea7u l\u00e0 hai trong n \u0111i\u1ec3m \u0111\u00e3 cho. Khi \u0111\u00f3:<br\/>+ S\u1ed1 d\u00e2y t\u1ea1o th\u00e0nh \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: $\\dfrac{n.(n - 1)}{2}$<br\/>+ S\u1ed1 cung tr\u00f2n \u0111\u01b0\u1ee3c t\u1ea1o th\u00e0nh \u0111\u01b0\u1ee3c t\u00ednh theo c\u00f4ng th\u1ee9c: n . (n - 1) ( ho\u1eb7c s\u1ed1 cung tr\u00f2n = s\u1ed1 d\u00e2y cung . 2)<\/span>","column":2}]}]},"correct":"","level":"3","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:14:59"}]}