{"common":{"save":0,"post_id":"1514","level":1,"total":20,"point":5,"point_extra":0},"segment":[{"id":"1951","post_id":"1514","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":[[1]],"list":[{"point":5,"ques":"\u0110i\u1ec3m c\u00e1ch \u0111\u1ec1u hai \u0111\u1ea7u m\u00fat c\u1ee7a \u0111o\u1ea1n th\u1eb3ng th\u00ec n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng \u0111\u00f3. <b> \u0110\u00fang <\/b> hay <b> sai <\/b>? ","select":["A. \u0110\u00daNG ","B. SAI"],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng","explain":" Theo \u0111\u1ecbnh l\u00fd \u0111\u1ea3o v\u1ec1 t\u00ednh ch\u1ea5t \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng: \u0110i\u1ec3m c\u00e1ch \u0111\u1ec1u hai \u0111\u1ea7u m\u00fat c\u1ee7a \u0111o\u1ea1n th\u1eb3ng th\u00ec n\u1eb1m tr\u00ean \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng \u0111\u00f3 <br\/> V\u1eady kh\u1eb3ng \u0111\u1ecbnh tr\u00ean l\u00e0 <span class='basic_pink'> \u0110\u00daNG <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:06"},{"id":"1952","post_id":"1514","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":[[1]],"list":[{"point":5,"ques":"T\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m c\u00e1ch \u0111\u1ec1u hai \u0111\u1ea7u m\u00fat c\u1ee7a m\u1ed9t \u0111o\u1ea1n th\u1eb3ng l\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng \u0111\u00f3. <b> \u0110\u00fang <\/b> hay <b> sai <\/b>? ","select":["A. \u0110\u00daNG ","B. SAI"],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng","explain":" T\u1eeb \u0111\u1ecbnh l\u00fd thu\u1eadn v\u00e0 \u0111\u1ea3o v\u1ec1 t\u00ednh ch\u1ea5t \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng, ta c\u00f3: T\u1eadp h\u1ee3p c\u00e1c \u0111i\u1ec3m c\u00e1ch \u0111\u1ec1u hai \u0111\u1ea7u m\u00fat c\u1ee7a m\u1ed9t \u0111o\u1ea1n th\u1eb3ng l\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng \u0111\u00f3. <br\/> V\u1eady kh\u1eb3ng \u0111\u1ecbnh tr\u00ean l\u00e0 <span class='basic_pink'> \u0110\u00daNG <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:06"},{"id":"1953","post_id":"1514","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":[[1]],"list":[{"point":5,"ques":"Cho h\u00ecnh v\u1ebd: <br\/> <center><img src='img\/H7C3B22_D01.png' \/><\/center> <br\/> B\u1ea1n Lan v\u1ebd \u0111\u01b0\u1eddng trung tr\u1ef1c $MN$ c\u1ee7a \u0111o\u1ea1n th\u1eb3ng $AB$ nh\u01b0 tr\u00ean h\u00ecnh v\u1ebd (cung tr\u00f2n t\u00e2m $A$ v\u00e0 cung tr\u00f2n t\u00e2m $B$ c\u00f3 c\u00f9ng b\u00e1n k\u00ednh). <b> \u0110\u00fang <\/b> hay <b> sai <\/b>? ","select":["A. \u0110\u00daNG ","B. SAI"],"hint":"","explain":" <span class='basic_left'> Ta c\u00f3 th\u1ec3 v\u1ebd \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng $AB$ nh\u01b0 sau: <br\/> +) L\u1ea5y $A$ l\u00e0m t\u00e2m v\u1ebd cung tr\u00f2n b\u00e1n k\u00ednh l\u1edbn h\u01a1n $\\dfrac{1}{2}AB$, sau \u0111\u00f3 l\u1ea5y $B$ l\u00e0m t\u00e2m v\u1ebd cung tr\u00f2n c\u00f9ng b\u00e1n k\u00ednh \u0111\u00f3. Hai cung tr\u00f2n n\u00e0y c\u1eaft nhau t\u1ea1i hai \u0111i\u1ec3m g\u1ecdi l\u00e0 $M$ v\u00e0 $N$ <br\/> +) D\u00f9ng th\u01b0\u1edbc th\u1eb3ng v\u1ebd \u0111\u01b0\u1eddng th\u1eb3ng $MN$, \u0111\u00f3 l\u00e0 \u0111\u01b0\u1eddng trung tr\u1ef1c c\u1ee7a \u0111o\u1ea1n th\u1eb3ng $AB$ <br\/> Do \u0111\u00f3 c\u00e1ch v\u1ebd c\u1ee7a b\u1ea1n Lan l\u00e0 <span class='basic_pink'> \u0110\u00daNG <\/span> <br\/> <span class='basic_green'> <i> L\u01b0u \u00fd: <br\/> +) Khi v\u1ebd hai cung tr\u00f2n tr\u00ean ta ph\u1ea3i l\u1ea5y b\u00e1n k\u00ednh l\u1edbn h\u01a1n $\\dfrac{1}{2}AB$ th\u00ec hai cung tr\u00f2n \u0111\u00f3 m\u1edbi c\u00f3 hai \u0111i\u1ec3m chung <br\/> +) Giao \u0111i\u1ec3m c\u1ee7a $AB$ v\u00e0 $MN$ c\u0169ng ch\u00ednh l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng $AB$ n\u00ean c\u00e1ch v\u1ebd tr\u00ean c\u0169ng ch\u00ednh l\u00e0 c\u00e1ch d\u1ef1ng trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng b\u1eb1ng th\u01b0\u1edbc v\u00e0 compa <\/i> <\/span> ","column":2}]}]},"correct":"","level":"1","hint":"","answer":"","type":"json","extra_type":"","time":"0","user_id":"0","test":"0","date":"2019-09-30 09:23:06"}]}