{"common":{"save":0,"post_id":"1005","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1761","post_id":"1005","mon_id":"0","chapter_id":"0","question":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","options":{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"T\u1ed5ng ba g\u00f3c c\u1ee7a m\u1ed9t tam gi\u00e1c b\u1eb1ng: ","select":["A. $90^{o} $ ","B. $120^{o} $ ","C. $180^{o} $ ","D. $150^{o} $ "],"explain":" T\u1ed5ng ba g\u00f3c c\u1ee7a m\u1ed9t tam gi\u00e1c b\u1eb1ng $180^{o} $ . <br\/> <br\/> <span class='basic_pink'> \u0110\u00e1p \u00e1n \u0111\u00fang l\u00e0 C. <\/span> ","column":4}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:03"},{"id":"1762","post_id":"1005","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["180"]]],"list":[{"point":5,"width":20,"content":"","type_input":"","ques":"Cho h\u00ecnh v\u1ebd sau: <br\/> <center><img src='img\/H7B16-01.png' \/><\/center> <br\/> \u0110i\u1ec1n k\u1ebft qu\u1ea3 v\u00e0o t\u1ed5ng sau: $\\widehat{A} + \\widehat{B} + \\widehat{C} + \\widehat{D} + \\widehat{E} = \\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}^o $","explain":"<span class='basic_left'>\u00c1p d\u1ee5ng t\u00ednh ch\u1ea5t g\u00f3c ngo\u00e0i c\u1ee7a tam gi\u00e1c:<br\/> $\\triangle MBD $ c\u00f3: $\\widehat{M_{1}} = \\widehat{B} + \\widehat{D}; $ <br\/> $\\triangle NCE $ c\u00f3: $\\widehat{N_{1}} = \\widehat{C} + \\widehat{E} $ <br\/> M\u1eb7t kh\u00e1c $\\triangle AMN $ c\u00f3 $\\widehat{A} + \\widehat{M_{1}} + \\widehat{N_{1}} = 180^{o} $ <br\/> $\\Rightarrow \\widehat{A} + \\widehat{B} + \\widehat{C} + \\widehat{D} + \\widehat{E} = 180^{o} $ <br\/><br\/> <span class='basic_pink'> V\u1eady c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: 180 <\/span>"}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:03"},{"id":"1763","post_id":"1005","mon_id":"0","chapter_id":"0","question":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","options":{"time":24,"part":[{"title":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["80"]]],"list":[{"point":5,"width":20,"content":"","type_input":"","ques":"Cho h\u00ecnh v\u1ebd, bi\u1ebft: $\\widehat{A} = 40^{o}; \\widehat{C} = 60^{o}; OC = OD $ <br\/> <center><img src='img\/H7B16-02.png' \/><\/center> <br\/> T\u00ednh s\u1ed1 \u0111o g\u00f3c $B$. <br\/> <b>\u0110\u00e1p \u00e1n: <\/b> $\\widehat{B} = \\FormInput[40][bl_elm_true basic_elm basic_blank basic_blank_part]{}^o $ ","explain":"<span class='basic_left'>$\\triangle OCD $ c\u00f3 $OC = OD, \\widehat{C} = 60^{o} \\Rightarrow \\triangle OCD $ \u0111\u1ec1u <br\/> $\\Rightarrow \\widehat{COD} = \\widehat{BOA} = 60^{o} $ (\u0111\u1ed1i \u0111\u1ec9nh) <br\/> $\\triangle OAB $ c\u00f3: $\\widehat{A} + \\widehat{AOB} + \\widehat{B} = 180^{o} $ <br\/> $\\Rightarrow 40^{o} + 60^{o} + \\widehat{B} = 180^{o} \\\\ \\Rightarrow \\widehat{B} = 80^{o} $<br\/><br\/> <span class='basic_pink'> V\u1eady c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: 80<\/span> "}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:03"}]}