{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"\u0110i\u1ec1u ki\u1ec7n \u0111\u1ec3 \u0111i\u1ec3m M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng PQ l\u00e0: ","select":["A. MP = MQ","B. MP + MQ = PQ v\u00e0 MP = MQ","C. MP + MQ = PQ","D. MP = MQ, M n\u1eb1m gi\u1eefa P v\u00e0 B"],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> \u0110\u1ec3 \u0111i\u1ec3m M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng PQ th\u00ec M ph\u1ea3i th\u1ecfa m\u00e3n \u0111\u00f4ng th\u1eddi hai \u0111i\u1ec1u ki\u1ec7n sau: <br\/> +) \u0110i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m P v\u00e0 Q t\u1ee9c l\u00e0 MP + MQ = PQ <br\/> +) \u0110i\u1ec3m \u0111\u00f3 chia \u0111o\u1ea1n th\u1eb3ng th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau t\u1ee9c l\u00e0 MP = MQ <br\/> V\u1eady \u0111i\u1ec1u ki\u1ec7n \u0111\u1ec3 \u0111i\u1ec3m M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng PQ l\u00e0: <br\/> <span class='basic_pink'> B. MP + MQ = PQ v\u00e0 MP = MQ <\/span> ","column":2}]}],"id_ques":2011},{"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":"\u0110i\u1ec3m I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MN khi: ","select":["A. IM + IN = MN","B. IM = IN","C. IM = IN = $\\dfrac{MN}{2}$","D. C\u1ea3 3 \u0111\u00e1p \u00e1n tr\u00ean \u0111\u1ec1u sai."],"hint":"","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> \u0110\u1ec3 \u0111i\u1ec3m I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MN th\u00ec I ph\u1ea3i th\u1ecfa m\u00e3n \u0111\u1ed3ng th\u1eddi hai \u0111i\u1ec1u ki\u1ec7n sau: <br\/> +) \u0110i\u1ec3m I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M v\u00e0 N t\u1ee9c l\u00e0 MI + IN = MN <br\/> +) \u0110i\u1ec3m \u0111\u00f3 chia \u0111o\u1ea1n th\u1eb3ng th\u00e0nh hai ph\u1ea7n b\u1eb1ng nhau t\u1ee9c l\u00e0 MI = IN <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. IM = IN = $\\dfrac{MN}{2}$ <\/span> ","column":2}]}],"id_ques":2012},{"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 \u0111o\u1ea1n th\u1eb3ng AB = 6cm, \u0111i\u1ec3m M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB. T\u00ednh AM = ? ","select":["A. AM = 3cm","B. AM = 2cm","C. AM = 4cm","D. AM = 12cm"],"hint":"V\u00ec M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB n\u00ean $AM = MB = \\dfrac{AB}{2}$","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB n\u00ean ta c\u00f3: <br\/> AM + MB = AB (1) <br\/> AM = MB (2) <br\/> Thay (2) v\u00e0 (1) ta c\u00f3: <br\/> $\\begin{align*} AM + AM &= AB \\\\ 2AM &= AB \\\\ AM &= \\dfrac{AB}{2} \\\\ AM &= \\dfrac{6}{2} \\\\ AM &= 3 (cm)\\end{align*}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. AM = 3cm<\/span> ","column":2}]}],"id_ques":2013},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Cho \u0111o\u1ea1n th\u1eb3ng MN = 12cm, \u0111i\u1ec3m I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MN. T\u00ednh MI = ? ","select":["A. MI = 7cm","B. MI = 5cm","C. MI = 8cm","D. MI = 6cm"],"hint":"V\u00ec I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MN n\u00ean $MI = IN = \\dfrac{MN}{2}$","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MN n\u00ean ta c\u00f3: <br\/> MI + IN = MN (1) <br\/> MI = IN (2) <br\/> Thay (2) v\u00e0 (1) ta c\u00f3: <br\/> $\\begin{align*} MI + IN &= MN \\\\ 2MI &= MN \\\\ MI &= \\dfrac{MN}{2} \\\\ MI &= \\dfrac{12}{2} \\\\ MI &= 6 (cm)\\end{align*}$ <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D. MI = 6cm<\/span> ","column":2}]}],"id_ques":2014},{"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":"Tr\u00ean tia Ox v\u1ebd 2 \u0111i\u1ec3m A, B sao cho OA = 2cm, OB = 4cm. H\u00e3y ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang.","select":["A. OA = AB","B. OA < AB","C. OB < AB","D. OA > AB"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Ch\u1ec9 ra \u0111i\u1ec3m A n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 B <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh AB = ? <br\/> <b> B\u01b0\u1edbc 3: <\/b> So s\u00e1nh OA, OB v\u00e0 AB r\u1ed3i ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3 h\u00ecnh v\u1ebd: <br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D105.png' \/><\/center> <br\/> V\u00ec A, B c\u00f9ng thu\u1ed9c tia Ox n\u00ean OA v\u00e0 OB l\u00e0 hai tia tr\u00f9ng nhau (1) <br\/> OA = 2cm, OB = 4cm m\u00e0 2cm < 4cm n\u00ean OA < OB (2) <br\/> T\u1eeb (1) v\u00e0 (2) $\\Rightarrow$ \u0110i\u1ec3m A n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 B <br\/> $\\begin{align*} OA + AB &= OB \\\\ 2cm + AB &= 4cm \\\\ AB &= 4cm - 2cm \\\\ AB &= 2cm \\end{align*}$ <br\/> V\u00ec AB = 2cm, OA = 2cm m\u00e0 2cm = 2cm n\u00ean OA = AB <br\/> OB = 4cm m\u00e0 2cm < 4cm n\u00ean OA < OB <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. OA = AB <\/span> ","column":2}]}],"id_ques":2015},{"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":"Tr\u00ean tia Om l\u1ea5y 2 \u0111i\u1ec3m M, N sao cho OM = 6cm, ON = 3cm. H\u00e3y ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang.","select":["A. OM > MN","B. OM < MN","C. OM = $\\dfrac{MN}{2}$"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Ch\u1ec9 ra \u0111i\u1ec3m N n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 M <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh MN = ? <br\/> <b> B\u01b0\u1edbc 3: <\/b> So s\u00e1nh OM v\u00e0 MN r\u1ed3i ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3 h\u00ecnh v\u1ebd: <br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D106.png' \/><\/center> <br\/> V\u00ec M, N c\u00f9ng thu\u1ed9c tia Om n\u00ean OM v\u00e0 ON l\u00e0 hai tia tr\u00f9ng nhau (1) <br\/> OM = 6cm, ON = 3cm m\u00e0 3cm < 6cm n\u00ean ON < OM (2) <br\/> T\u1eeb (1) v\u00e0 (2) $\\Rightarrow$ \u0110i\u1ec3m N n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 M <br\/> $\\begin{align*} ON + MN &= OM \\\\ 3cm + MN &= 6cm \\\\ MN &= 6cm - 3cm \\\\ MN &= 3cm \\end{align*}$ <br\/> V\u00ec MN = 3cm, OM = 6cm m\u00e0 6cm > 3cm n\u00ean OM > MN <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. OM > MN <\/span> ","column":3}]}],"id_ques":2016},{"time":24,"part":[{"title":"H\u00e3y s\u1eafp x\u1ebfp c\u00e1c c\u00e2u \u1edf c\u1ed9t b\u00ean ph\u1ea3i cho ph\u00f9 h\u1ee3p v\u1edbi h\u00ecnh \u1edf c\u1ed9t b\u00ean tr\u00e1i","title_trans":"","audio":"","temp":"matching","correct":[["2","4","1","3"]],"list":[{"point":5,"image":"","left":["<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D109.png' \/><\/center>","<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D110.png' \/><\/center>","<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D111.png' \/><\/center>","<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D112.png' \/><\/center>"],"right":["Tia AB","\u0110\u01b0\u1eddng th\u1eb3ng AB","C\u00f3 1 \u0111i\u1ec3m l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB","\u0110o\u1ea1n th\u1eb3ng AB"],"top":100,"hint":"","explain":"C\u00e1c kh\u1eb3ng \u0111\u1ecbnh t\u01b0\u01a1ng \u1ee9ng v\u1edbi h\u00ecnh v\u1ebd l\u00e0: <br\/> \u0110\u01b0\u1eddng th\u1eb3ng AB <br\/><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D109.png' \/><\/center> <br\/> \u0110o\u1ea1n th\u1eb3ng AB <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D110.png' \/><\/center> <br\/>Tia AB <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D111.png' \/><\/center> <br\/> C\u00f3 1 \u0111i\u1ec3m l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D112.png' \/><\/center> "}]}],"id_ques":2017},{"time":24,"part":[{"title":"H\u00e3y s\u1eafp x\u1ebfp c\u00e1c c\u00e2u \u1edf c\u1ed9t b\u00ean ph\u1ea3i cho ph\u00f9 h\u1ee3p v\u1edbi h\u00ecnh \u1edf c\u1ed9t b\u00ean tr\u00e1i","title_trans":"","audio":"","temp":"matching","correct":[["2","1","4","3"]],"list":[{"point":5,"image":"","left":["<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D113.png' \/><\/center>","<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D114.png' \/><\/center>","<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D115.png' \/><\/center>","<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D116.png' \/><\/center>"],"right":["Hai \u0111o\u1ea1n th\u1eb3ng c\u1eaft nhau t\u1ea1i \u0111i\u1ec3m n\u1eb1m gi\u1eefa c\u1ee7a m\u1ed7i \u0111o\u1ea1n","\u0110o\u1ea1n th\u1eb3ng c\u1eaft \u0111\u01b0\u1eddng th\u1eb3ng t\u1ea1i m\u1ed9t \u0111i\u1ec3m l\u00e0 \u0111i\u1ec3m n\u1eb1m gi\u1eefa c\u1ee7a \u0111o\u1ea1n th\u1eb3ng \u0111\u00f3","Hai \u0111o\u1ea1n th\u1eb3ng c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111o\u1ea1n","\u0110o\u1ea1n th\u1eb3ng c\u1eaft \u0111\u01b0\u1eddng th\u1eb3ng t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng"],"top":130,"hint":"","explain":"C\u00e1c kh\u1eb3ng \u0111\u1ecbnh t\u01b0\u01a1ng \u1ee9ng v\u1edbi h\u00ecnh v\u1ebd l\u00e0: <br\/>Hai \u0111o\u1ea1n th\u1eb3ng c\u1eaft nhau t\u1ea1i \u0111i\u1ec3m n\u1eb1m gi\u1eefa c\u1ee7a m\u1ed7i \u0111o\u1ea1n <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D114.png' \/><\/center> <br\/> \u0110o\u1ea1n th\u1eb3ng c\u1eaft \u0111\u01b0\u1eddng th\u1eb3ng t\u1ea1i m\u1ed9t \u0111i\u1ec3m l\u00e0 \u0111i\u1ec3m n\u1eb1m gi\u1eefa c\u1ee7a \u0111o\u1ea1n th\u1eb3ng \u0111\u00f3 <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D113.png' \/><\/center> <br\/> Hai \u0111o\u1ea1n th\u1eb3ng c\u1eaft nhau t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a m\u1ed7i \u0111o\u1ea1n <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D116.png' \/><\/center> <br\/> \u0110o\u1ea1n th\u1eb3ng c\u1eaft \u0111\u01b0\u1eddng th\u1eb3ng t\u1ea1i trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D115.png' \/><\/center> "}]}],"id_ques":2018},{"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":"Kho\u1ea3ng c\u00e1ch t\u1eeb t\u1ec9nh M \u0111\u1ebfn t\u1ec9nh P l\u00e0 650km. T\u1ec9nh T n\u1eb1m gi\u1eefa hai t\u1ec9nh M v\u00e0 P, t\u1ec9nh T c\u00e1ch t\u1ec9nh M l\u00e0 170km. T\u00ednh kho\u1ea3ng c\u00e1ch gi\u1eefa t\u1ec9nh T v\u00e0 t\u1ec9nh P bi\u1ebft 3 t\u1ec9nh n\u1eb1m tr\u00ean m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng. V\u1eady kho\u1ea3ng c\u00e1ch gi\u1eefa t\u1ec9nh T v\u00e0 t\u1ec9nh P l\u00e0:","select":["A. TP = 480km","B. TP = 470km","C. TP = 820km","D. TP = 810km"],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t n\u1ebfu \u0111i\u1ec3m T n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M v\u00e0 P th\u00ec MT + TP = MP","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec t\u1ec9nh T n\u1eb1m gi\u1eefa hai t\u1ec9nh M v\u00e0 P n\u00ean ta c\u00f3: <br\/> $\\begin{align*} MT + TP &= MP \\\\ 170km + TP &= 650km \\\\ TP &= 650km - 170km \\\\ TP &= 480km \\end{align*}$ <br\/> V\u1eady kho\u1ea3ng c\u00e1ch t\u1eeb t\u1ec9nh T t\u1edbi t\u1ec9nh P l\u00e0 480km <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A. 480km <\/span> ","column":2}]}],"id_ques":2019},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Kho\u1ea3ng c\u00e1ch t\u1eeb t\u1ec9nh A \u0111\u1ebfn t\u1ec9nh B l\u00e0 350km. T\u1ec9nh C n\u1eb1m gi\u1eefa hai t\u1ec9nh A v\u00e0 B, t\u1ec9nh C c\u00e1ch t\u1ec9nh A l\u00e0 130km. T\u00ednh kho\u1ea3ng c\u00e1ch gi\u1eefa t\u1ec9nh C v\u00e0 t\u1ec9nh B bi\u1ebft 3 t\u1ec9nh n\u1eb1m tr\u00ean m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng. V\u1eady kho\u1ea3ng c\u00e1ch gi\u1eefa t\u1ec9nh C v\u00e0 t\u1ec9nh B l\u00e0:","select":["A. CB = 480km","B. CB = 220km","C. CB = 210km","D. M\u1ed9t s\u1ed1 kh\u00e1c"],"hint":"D\u1ef1a v\u00e0o t\u00ednh ch\u1ea5t n\u1ebfu \u0111i\u1ec3m C n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A, B th\u00ec AC + CB = AB","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec t\u1ec9nh C n\u1eb1m gi\u1eefa hai t\u1ec9nh A v\u00e0 B n\u00ean ta c\u00f3: <br\/> $\\begin{align*} AC + CB &= AB \\\\ 130km + CB &= 350km \\\\ CB &= 350km - 130km \\\\ CB &= 220km \\end{align*}$ <br\/> V\u1eady kho\u1ea3ng c\u00e1ch t\u1eeb t\u1ec9nh C t\u1edbi t\u1ec9nh B l\u00e0 220km <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: B. 220km <\/span> ","column":2}]}],"id_ques":2020},{"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":"Tr\u00ean m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng v\u1ebd 3 \u0111i\u1ec3m A, B, C sao cho AC = 1cm, CB = 2cm, AB = 3cm. H\u1ecfi \u0111i\u1ec3m n\u00e0o l\u00e0 \u0111i\u1ec3m n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m c\u00f2n l\u1ea1i?","select":["A. \u0110i\u1ec3m A","B. \u0110i\u1ec3m B","C. \u0110i\u1ec3m C","D. Kh\u00f4ng \u0111i\u1ec3m n\u00e0o n\u1eb1m gi\u1eefa"],"hint":"T\u00ednh AC + CB r\u1ed3i so s\u00e1nh v\u1edbi AB","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: AC + CB = 1cm + 2cm = 3cm <br\/> M\u00e0 AB = 3cm<br\/> Do \u0111\u00f3: AC + CB = AB <br\/> $\\Rightarrow$ \u0110i\u1ec3m C n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. \u0110i\u1ec3m C <\/span> ","column":2}]}],"id_ques":2021},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Tr\u00ean m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng v\u1ebd 3 \u0111i\u1ec3m M, P, Q sao cho MP = 5cm, MQ = 3cm, PQ = 9cm. H\u1ecfi \u0111i\u1ec3m n\u00e0o l\u00e0 \u0111i\u1ec3m n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m c\u00f2n l\u1ea1i?","select":["A. \u0110i\u1ec3m M","B. \u0110i\u1ec3m P","C. \u0110i\u1ec3m Q","D. Kh\u00f4ng \u0111i\u1ec3m n\u00e0o n\u1eb1m gi\u1eefa"],"hint":"T\u00ednh t\u1ed5ng \u0111\u1ed9 d\u00e0i hai \u0111o\u1ea1n th\u1eb3ng r\u1ed3i so s\u00e1nh v\u1edbi \u0111o\u1ea1n c\u00f2n l\u1ea1i","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: MP + MQ= 5cm + 3cm = 8cm <br\/> M\u00e0 PQ = 9cm<br\/> Do \u0111\u00f3: MP + MQ $\\neq$ PQ <br\/> $\\Rightarrow$ \u0110i\u1ec3m M kh\u00f4ng n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m P v\u00e0 Q <br\/> MP + PQ = 5cm + 9cm = 14cm <br\/> M\u00e0 MQ = 3cm n\u00ean MP + PQ $\\neq$ MQ <br\/> $\\Rightarrow$ \u0110i\u1ec3m P kh\u00f4ng n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M v\u00e0 Q <br\/> Ta c\u00f3: MQ + PQ = 3cm + 9cm = 12cm <br\/> M\u00e0 MP = 5cm n\u00ean MQ + PQ $\\neq$ MP <br\/> $\\Rightarrow$ \u0110i\u1ec3m Q kh\u00f4ng n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M v\u00e0 P <br\/> V\u1eady trong 3 \u0111i\u1ec3m tr\u00ean kh\u00f4ng c\u00f3 \u0111i\u1ec3m n\u00e0o n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m c\u00f2n l\u1ea1i <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: D <\/span> ","column":2}]}],"id_ques":2022},{"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 I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB. Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang?","select":["A. Hai \u0111i\u1ec3m A v\u00e0 B n\u1eb1m c\u00f9ng ph\u00eda \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m I","B. \u0110i\u1ec3m I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B","C. Tia IA v\u00e0 IB l\u00e0 hai tia \u0111\u1ed1i nhau","D. \u0110\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng IB b\u1eb1ng \u0111\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng IA"],"hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng xem I c\u1ea7n th\u1ecfa m\u00e3n c\u00e1c \u0111i\u1ec1u ki\u1ec7n n\u00e0o, t\u1eeb \u0111\u00f3 ch\u1ecdn ra \u0111\u00e1p \u00e1n sai","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D125.png' \/><\/center> <br\/> V\u00ec I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB n\u00ean I th\u1ecfa m\u00e3n: <br\/> +) \u0110i\u1ec3m I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B (1) <br\/> +) IA = IB (2) <br\/> T\u1eeb (1) $\\Rightarrow$ A, B n\u1eb1m kh\u00e1c ph\u00eda \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m I v\u00e0 IA; IB l\u00e0 hai tia \u0111\u1ed1i nhau <br\/> <span class='basic_pink'> V\u1eady kh\u1eb3ng \u0111\u1ecbnh sai l\u00e0: A. Hai \u0111i\u1ec3m A v\u00e0 B n\u1eb1m c\u00f9ng ph\u00eda \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m I <\/span> ","column":2}]}],"id_ques":2023},{"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":"Cho M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AH. Kh\u1eb3ng \u0111\u1ecbnh n\u00e0o sau \u0111\u00e2y kh\u00f4ng \u0111\u00fang?","select":["A. Hai \u0111i\u1ec3m A v\u00e0 M n\u1eb1m c\u00f9ng ph\u00eda \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m H","B. \u0110i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 H","C. Tia AM v\u00e0 AH l\u00e0 hai tia \u0111\u1ed1i nhau","D. \u0110\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng MH b\u1eb1ng \u0111\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng MA"],"hint":"D\u1ef1a v\u00e0o kh\u00e1i ni\u1ec7m trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng xem M c\u1ea7n th\u1ecfa m\u00e3n c\u00e1c \u0111i\u1ec1u ki\u1ec7n n\u00e0o, t\u1eeb \u0111\u00f3 ch\u1ecdn ra \u0111\u00e1p \u00e1n sai","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D126.png' \/><\/center> <br\/> V\u00ec M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AH n\u00ean M th\u1ecfa m\u00e3n: <br\/> +) \u0110i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 H (1) <br\/> +) MA = MH (2) <br\/> T\u1eeb (1) $\\Rightarrow$ Hai \u0111i\u1ec3m A, M n\u1eb1m c\u00f9ng ph\u00eda \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m H v\u00e0 AM, AH l\u00e0 hai tia tr\u00f9ng nhau <br\/> <span class='basic_pink'> V\u1eady kh\u1eb3ng \u0111\u1ecbnh sai l\u00e0: A. Hai tia AM v\u00e0 AH l\u00e0 hai tia \u0111\u1ed1i nhau <\/span> ","column":2}]}],"id_ques":2024},{"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 \u0111o\u1ea1n th\u1eb3ng AB = 4cm, \u0111i\u1ec3m C n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B. G\u1ecdi M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AC, N l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng CB. T\u00ednh MN.","select":["A. MN = 2cm","B. MN = 3cm","C. MN = 1,5cm","D. M\u1ed9t s\u1ed1 kh\u00e1c"],"hint":"T\u00ecm m\u1ed1i qua h\u1ec7 gi\u1eefa MC, CN v\u1edbi AB r\u1ed3i t\u00ednh MN = MC + CN","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D129.png' \/><\/center> <br\/> V\u00ec C n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A, B n\u00ean AC + CB = AB (1) <br\/> M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AC n\u00ean AM + MC = AC v\u00e0 AM = MC = $\\dfrac{AC}{2}$ (2) <br\/> N l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng CB n\u00ean CN + NB = CB v\u00e0 NC = NB = $\\dfrac{CB}{2}$ (3) <br\/> Thay (2) v\u00e0 (3) v\u00e0o (1) ta \u0111\u01b0\u1ee3c: MC + MC + CN + CN = AB hay 2MC + 2CN = AB <br\/> $\\Rightarrow$ MC + CN = $\\dfrac{AB}{2} = \\dfrac{4}{2} = 2$ (cm) <br\/> V\u00ec C n\u1eb1m gi\u1eefa A v\u00e0 B, M l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AC, N l\u00e0 trung \u0111i\u1ec3m c\u1ee7a CB n\u00ean C n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M, N <br\/> $\\Rightarrow$ MC + CN = MN m\u00e0 MC + CN = 2cm n\u00ean MN = 2cm <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: A.MN = 2cm <\/span> ","column":2}]}],"id_ques":2025},{"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":"Cho \u0111o\u1ea1n th\u1eb3ng MN = 8cm, \u0111i\u1ec3m I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M v\u00e0 N. G\u1ecdi K l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MI, H l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng IN. T\u00ednh KH.","select":["A. KH = 6cm","B. KH = 2cm","C. KH = 4cm","D. M\u1ed9t s\u1ed1 kh\u00e1c"],"hint":"T\u00ecm m\u1ed1i qua h\u1ec7 gi\u1eefa IK, IH v\u1edbi MN r\u1ed3i t\u00ednh KH = IK + IH","explain":" <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D130.png' \/><\/center> <br\/> V\u00ec I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m M, N n\u00ean MI + IN = MN (1) <br\/> K l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng MI n\u00ean KM + KI = MI v\u00e0 KM = KI = $\\dfrac{MI}{2}$ (2) <br\/> H l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng IN n\u00ean IH + HN = IN v\u00e0 IH = HN = $\\dfrac{IN}{2}$ (3) <br\/> Thay (2) v\u00e0 (3) v\u00e0o (1) ta \u0111\u01b0\u1ee3c: IK + IK + IH + IH = MN hay 2IK + 2IH = MN <br\/> $\\Rightarrow$ IK + IH = $\\dfrac{MN}{2} = \\dfrac{8}{2} = 4$ (cm) <br\/> V\u00ec I n\u1eb1m gi\u1eefa M v\u00e0 N, K l\u00e0 trung \u0111i\u1ec3m c\u1ee7a IM, H l\u00e0 trung \u0111i\u1ec3m c\u1ee7a IN n\u00ean I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m K v\u00e0 H <br\/> $\\Rightarrow$ IK + IH = KH m\u00e0 IK + IH = 4cm n\u00ean KH = 4cm <br\/> <span class='basic_pink'> V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0: C. KH = 4cm <\/span> ","column":2}]}],"id_ques":2026},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Cho 3 \u0111i\u1ec3m O, P, Q sao cho OP = OQ = 2cm; PQ = 3cm. <br\/> \u0110i\u1ec3m O l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng PQ <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG","B. SAI"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>V\u00ec OP = OQ = 2cm n\u00ean \u0111\u1ec3 O l\u00e0 trung \u0111i\u1ec3m c\u1ee7a PQ th\u00ec O ph\u1ea3i n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m P v\u00e0 Q <br\/> T\u00ednh OP + OQ r\u1ed3i so s\u00e1nh v\u1edbi PQ <br\/> N\u1ebfu OP + OQ = PQ th\u00ec \u0111i\u1ec3m O n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m P v\u00e0 Q<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: V\u00ec OP = OQ = 2cm (\u0111\u1ec1 b\u00e0i) <br\/> N\u00ean \u0111\u1ec3 O l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng PQ th\u00ec \u0111i\u1ec3m O ph\u1ea3i n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m P v\u00e0 Q <br\/> Th\u1eadt v\u1eady: OP + OQ = 2cm + 2cm = 4cm <br\/> M\u00e0 PQ = 3cm < OP + OQ n\u00ean \u0111i\u1ec3m O kh\u00f4ng n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m P v\u00e0 Q <br\/> V\u1eady kh\u1eb3ng \u0111\u1ecbnh \"\u0110i\u1ec3m O l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng PQ\" l\u00e0 <span class='basic_pink'> SAI<\/span> ","column":2}]}],"id_ques":2027},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Cho 3 \u0111i\u1ec3m A, I, B sao cho IA = IB = 3cm; AB = 5cm. <br\/> \u0110i\u1ec3m I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB <b> \u0110\u00daNG <\/b> hay <b> SAI <\/b>?","select":["A. \u0110\u00daNG","B. SAI"],"hint":"","explain":" <span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/>V\u00ec IA = IB = 3cm n\u00ean \u0111\u1ec3 I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a AB th\u00ec I ph\u1ea3i n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B <br\/> T\u00ednh IA + IB r\u1ed3i so s\u00e1nh v\u1edbi AB <br\/> N\u1ebfu IA + IB = AB th\u00ec \u0111i\u1ec3m I n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B<\/span> <br\/><br\/> <span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> Ta c\u00f3: V\u00ec IA = IB = 3cm (\u0111\u1ec1 b\u00e0i) <br\/> N\u00ean \u0111\u1ec3 I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB th\u00ec \u0111i\u1ec3m I ph\u1ea3i n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B <br\/> Th\u1eadt v\u1eady: IA + IB = 3cm + 3cm = 6cm <br\/> M\u00e0 AB = 5cm < IA + IB n\u00ean \u0111i\u1ec3m I kh\u00f4ng n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B <br\/> V\u1eady kh\u1eb3ng \u0111\u1ecbnh \"\u0110i\u1ec3m I l\u00e0 trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB\" l\u00e0 <span class='basic_pink'> SAI<\/span> ","column":2}]}],"id_ques":2028},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["8"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"Tr\u00ean tia Ox l\u1ea5y c\u00e1c \u0111i\u1ec3m M, N sao cho OM = 3cm, MN = 5cm. T\u00ednh \u0111\u1ed9 d\u00e0i \u0111o\u1ea1n th\u1eb3ng ON. <br\/> ON = _input_ cm","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> Ch\u1ec9 ra \u0111i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 N <br\/> <b> B\u01b0\u1edbc 2: <\/b> T\u00ednh ON = ? <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> <center><img src='https://www.luyenthi123.com/file/luyenthi123/lop6/toan/hinhhoc/bai6/lv1/img\/H616_D134.png' \/><\/center> <br\/> V\u00ec M, N c\u00f9ng thu\u1ed9c tia Ox m\u00e0 OM = 3cm, MN = 5cm <br\/> OM < MN n\u00ean N kh\u00f4ng n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 M <br\/> $\\Rightarrow$ \u0110i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m O v\u00e0 N <br\/> $\\begin{align*} \\Rightarrow OM + MN &= ON \\\\ 3cm + 5cm &= ON \\\\ ON &= 8cm \\end{align*}$ <br\/> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u00e0: <span class='basic_pink'> 8 <\/span> "}]}],"id_ques":2029},{"time":9,"part":[{"title":"\u0110i\u1ec1n s\u1ed1 th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng","title_trans":"","temp":"fill_the_blank","correct":[[["5"],["2"]]],"list":[{"point":5,"width":60,"type_input":"","ques":"Cho \u0111o\u1ea1n th\u1eb3ng AB = 7cm. L\u1ea5y \u0111i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B sao cho MA - MB = 3cm. T\u00ednh \u0111\u1ed9 d\u00e0i c\u00e1c \u0111o\u1ea1n th\u1eb3ng MA, MB. <br\/> MA = _input_ cm; MB = _input_ cm","hint":"","explain":"<span class='basic_left'><span class='basic_green'>H\u01b0\u1edbng d\u1eabn:<\/span><br\/> <b> B\u01b0\u1edbc 1: <\/b> V\u00ec \u0111i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B n\u00ean MA + MB = AB = 7cm <br\/> <b> B\u01b0\u1edbc 2: <\/b> V\u00ec MA - MB = 3cm <br\/> B\u00e0i to\u00e1n quy v\u1ec1 b\u00e0i to\u00e1n t\u00ecm hai s\u1ed1 bi\u1ebft t\u1ed5ng v\u00e0 hi\u1ec7u <br\/> T\u00ednh \u0111\u01b0\u1ee3c MA = ? v\u00e0 MB = ? <\/span> <br\/><br\/><span class='basic_green'>B\u00e0i gi\u1ea3i:<\/span> <br\/> V\u00ec \u0111i\u1ec3m M n\u1eb1m gi\u1eefa hai \u0111i\u1ec3m A v\u00e0 B n\u00ean ta c\u00f3: <br\/> MA + MB = AB = 7cm <br\/> M\u00e0 theo \u0111\u1ec1 b\u00e0i MA - MB = 3cm <br\/> $\\Rightarrow$ $MA = \\dfrac{7 + 3}{2} = 5$cm <br\/> $MB = \\dfrac{7 - 3}{2} = 2$cm<br\/> V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n v\u00e0o \u00f4 tr\u1ed1ng l\u1ea7n l\u01b0\u1ee3t l\u00e0: <span class='basic_pink'> 5; 3 <\/span> "}]}],"id_ques":2030}],"lesson":{"save":0,"level":1}}