{"segment":[{"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":"\u0110\u1ed1i v\u1edbi th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3, khi v\u1eadt \u0111\u1eb7t r\u1ea5t xa th\u1ea5u k\u00ednh th\u00ec \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt t\u1ea1o b\u1edfi th\u1ea5u k\u00ednh ","select":["A. \u1edf t\u1ea1i quang t\u00e2m.","B. \u1edf sau v\u00e0 c\u00e1ch th\u1ea5u k\u00ednh m\u1ed9t kho\u1ea3ng b\u1eb1ng ti\u00eau c\u1ef1.","C. \u1edf tr\u01b0\u1edbc v\u00e0 c\u00e1ch th\u1ea5u k\u00ednh m\u1ed9t kho\u1ea3ng b\u1eb1ng ti\u00eau c\u1ef1.","D. \u1edf r\u1ea5t xa so v\u1edbi ti\u00eau \u0111i\u1ec3m."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":3491},{"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":"\u1ea2nh \u1ea3o c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 v\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 gi\u1ed1ng nhau \u1edf ch\u1ed7 ","select":["A. ch\u00fang c\u00f9ng chi\u1ec1u v\u1edbi v\u1eadt.","B. ch\u00fang ng\u01b0\u1ee3c chi\u1ec1u v\u1edbi v\u1eadt.","C. ch\u00fang l\u1edbn h\u01a1n v\u1eadt.","D. ch\u00fang nh\u1ecf h\u01a1n v\u1eadt."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3492},{"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":"N\u1ebfu \u0111\u01b0a m\u1ed9t v\u1eadt ra th\u1eadt xa th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 th\u00ec \u1ea3nh c\u1ee7a v\u1eadt ","select":["A. di chuy\u1ec3n g\u1ea7n th\u1ea5u k\u00ednh h\u01a1n.","B. c\u00f3 v\u1ecb tr\u00ed kh\u00f4ng thay \u0111\u1ed5i.","C. di chuy\u1ec3n ra xa v\u00f4 c\u00f9ng.","D. c\u00e1ch th\u1ea5u k\u00ednh m\u1ed9t kho\u1ea3ng b\u1eb1ng ti\u00eau c\u1ef1. "],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3493},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai45/lv2/img\/4.jpg'\/><\/center>V\u00e2\u0323t AB h\u00ecnh m\u0169i t\u00ean \u0111\u01b0\u1ee3c \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a m\u1ed9t d\u1ee5ng c\u1ee5 quang h\u1ecdc cho \u1ea3nh A\u2019B\u2019 nh\u01b0 h\u00ecnh v\u1ebd sau. D\u1ee5ng c\u1ee5 quang h\u1ecdc \u0111\u00f3 l\u00e0 ","select":["A. Th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5.","B. Th\u1ea5u k\u00ednh ph\u00e2n k\u00ec.","C. G\u01b0\u01a1ng ph\u1eb3ng.","D. K\u00ednh l\u00fap . "],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3494},{"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":"V\u1eadt s\u00e1ng AB \u0111\u01b0\u1ee3c \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ch\u00ednh t\u1ea1i ti\u00eau \u0111i\u1ec3m c\u1ee7a m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 c\u00f3 ti\u00eau c\u1ef1 f. N\u1ebfu d\u1ecbch chuy\u1ec3n v\u1eadt l\u1ea1i g\u1ea7n th\u1ea5u k\u00ednh th\u00ec \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt s\u1ebd ","select":["A. c\u00e0ng l\u1edbn v\u00e0 c\u00e0ng g\u1ea7n th\u1ea5u k\u00ednh.","B. c\u00e0ng nh\u1ecf v\u00e0 c\u00e0ng g\u1ea7n th\u1ea5u k\u00ednh.","C. c\u00e0ng l\u1edbn v\u00e0 c\u00e0ng xa th\u1ea5u k\u00ednh.","D. c\u00e0ng nh\u1ecf v\u00e0 c\u00e0ng xa th\u1ea5u k\u00ednh."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3495},{"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":"L\u1ea7n l\u01b0\u1ee3t \u0111\u1eb7t v\u1eadt AB tr\u01b0\u1edbc th\u1ea5u k\u00ednh ph\u00e2n k\u00ec v\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5. Th\u1ea5u k\u00ednh ph\u00e2n k\u00ec cho \u1ea3nh \u1ea3o ${{A}_{1}}{{B}_{1}}$ , th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 cho \u1ea3nh \u1ea3o ${{A}_{2}}{{B}_{2}}$ th\u00ec ","select":["A. ${{A}_{1}}{{B}_{1}}$ < ${{A}_{2}}{{B}_{2}}$ ","B. ${{A}_{1}}{{B}_{1}}$ = ${{A}_{2}}{{B}_{2}}$ .","C. ${{A}_{1}}{{B}_{1}}$ >${{A}_{2}}{{B}_{2}}$ .","D. ${{A}_{1}}{{B}_{1}}$ ${{A}_{2}}{{B}_{2}}$ ."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3496},{"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":"V\u00e2\u0323t AB c\u00f3 \u0111\u1ed9 cao h \u0111\u01b0\u1ee3c \u0111\u1eb7t vu\u00f4ng g\u00f3c v\u1edbi tr\u1ee5c ch\u00ednh c\u1ee7a m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec. \u0110i\u1ec3m A n\u1eb1m tr\u00ean tr\u1ee5c ch\u00ednh v\u00e0 c\u00f3 v\u1ecb tr\u00ed t\u1ea1i ti\u00eau \u0111i\u1ec3m F. \u1ea2nh A\u2019B\u2019 c\u00f3 \u0111\u1ed9 cao l\u00e0 h\u2019 th\u00ec ","select":["A. h = h\u2019. ","B. h =2h\u2019. ","C. h =$\\dfrac{h'}{2}$.","D. h < h\u2019."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3497},{"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":"\u0110\u1eb7t m\u1ed9t v\u1eadt s\u00e1ng AB tr\u01b0\u1edbc th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 thu \u0111\u01b0\u1ee3c \u1ea3nh A\u2019B\u2019 l\u00e0 ","select":["A. \u1ea3nh \u1ea3o, ng\u01b0\u1ee3c chi\u1ec1u v\u1edbi v\u1eadt, lu\u00f4n nh\u1ecf h\u01a1n v\u1eadt.","B. \u1ea3nh \u1ea3o, c\u00f9ng chi\u1ec1u v\u1edbi v\u1eadt, lu\u00f4n nh\u1ecf h\u01a1n v\u1eadt.","C. \u1ea3nh \u1ea3o, ng\u01b0\u1ee3c chi\u1ec1u v\u1edbi v\u1eadt, lu\u00f4n l\u1edbn h\u01a1n v\u1eadt.","D. \u1ea3nh th\u1eadt, c\u00f9ng chi\u1ec1u, v\u00e0 l\u1edbn h\u01a1n v\u1eadt."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3498},{"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":"Khi \u0111\u1eb7t trang s\u00e1ch tr\u01b0\u1edbc m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 th\u00ec ","select":["A. \u1ea3nh c\u1ee7a d\u00f2ng ch\u1eef nh\u1ecf h\u01a1n d\u00f2ng ch\u1eef th\u1eadt tr\u00ean trang s\u00e1ch.","B. \u1ea3nh c\u1ee7a d\u00f2ng ch\u1eef b\u1eb1ng d\u00f2ng ch\u1eef th\u1eadt tr\u00ean trang s\u00e1ch.","C. \u1ea3nh c\u1ee7a d\u00f2ng ch\u1eef l\u1edbn h\u01a1n d\u00f2ng ch\u1eef th\u1eadt tr\u00ean trang s\u00e1ch.","D. kh\u00f4ng quan s\u00e1t \u0111\u01b0\u1ee3c \u1ea3nh c\u1ee7a d\u00f2ng ch\u1eef tr\u00ean trang s\u00e1ch."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3499},{"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":"V\u1eadt \u0111\u1eb7t \u1edf v\u1ecb tr\u00ed n\u00e0o tr\u01b0\u1edbc th\u1ea5u k\u00ednh ph\u00e2n k\u00ec cho \u1ea3nh tr\u00f9ng v\u1ecb tr\u00ed ti\u00eau \u0111i\u1ec3m ","select":["A. \u0110\u1eb7t trong kho\u1ea3ng ti\u00eau c\u1ef1.","B. \u0110\u1eb7t ngo\u00e0i kho\u1ea3ng ti\u00eau c\u1ef1.","C. \u0110\u1eb7t t\u1ea1i ti\u00eau \u0111i\u1ec3m.","D. \u0110\u1eb7t r\u1ea5t xa."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":3500},{"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":"<center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai45/lv2/img\/11.jpg'\/><\/center>D\u1ef1a v\u00e0o \u1ea3nh c\u1ee7a \u0111i\u1ec3m s\u00e1ng t\u1ea1o b\u1edfi th\u1ea5u k\u00ednh trong c\u00e1c h\u00ecnh v\u1ebd sau. ( S l\u00e0 \u0111i\u1ec3m s\u00e1ng, S\u2019 l\u00e0 \u1ea3nh, l\u00e0 tr\u1ee5c ch\u00ednh). Ca\u0301c th\u00e2\u0301u ki\u0301nh","select":["A. 1,2,3 l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5.","B. 1,2,3 l\u00e0 th\u1ea5u k\u00ednh ph\u00e2n k\u00ec.","C. 1,2 l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 v\u00e0 3 l\u00e0 th\u1ea5u k\u00ednh ph\u00e2n k\u00ec. ","D. 1,3 l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 v\u00e0 2 l\u00e0 th\u1ea5u k\u00ednh ph\u00e2n k\u00ec. "],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3501},{"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":"V\u1eadt AB \u0111\u1eb7t tr\u01b0\u1edbc th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 c\u00f3 ti\u00eau c\u1ef1 f, c\u00f3 A n\u1eb1m tr\u00ean tr\u1ee5c ch\u00ednh v\u00e0 c\u00e1ch th\u1ea5u k\u00ednh m\u1ed9t kho\u1ea3ng OA cho \u1ea3nh A\u2019B\u2019 cao b\u1eb1ng n\u1eeda v\u1eadt AB khi ","select":["A. OA < f.","B. OA=f .","C. OA >f.","D. OA = 2f."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":3502},{"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":"M\u1ed9t v\u1eadt s\u00e1ng \u0111\u01b0\u1ee3c \u0111\u1eb7t t\u1ea1i ti\u00eau \u0111i\u1ec3m c\u1ee7a th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3. Kho\u1ea3ng c\u00e1ch gi\u1eefa \u1ea3nh v\u00e0 th\u1ea5u k\u00ednh l\u00e0 ","select":["A. $\\dfrac{f}{2}$.","B. $\\dfrac{f}{3}$.","C. 2f.","D. f."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3503},{"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":"\u1ea2nh c\u1ee7a m\u1ed9t ng\u1ecdn n\u1ebfn qua m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec: ","select":["A. C\u00f3 th\u1ec3 l\u00e0 \u1ea3nh th\u1eadt, c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o","B. Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, nh\u1ecf h\u01a1n ng\u1ecdn n\u1ebfn","C. Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, l\u1edbn h\u01a1n ng\u1ecdn n\u1ebfn","D. Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, c\u00f3 th\u1ec3 l\u1edbn h\u01a1n ho\u1eb7c nh\u1ecf h\u01a1n ng\u1ecdn n\u1ebfn"],"hint":"","explain":"<span class='basic_left'>Ta c\u00f3 \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt qua th\u1ea5u k\u00ednh ph\u00e2n k\u00ec lu\u00f4n l\u00e0 \u1ea3nh \u1ea3o, c\u00f9ng chi\u1ec1u v\u00e0 nh\u1ecf h\u01a1n v\u1eadt.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3504},{"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":"Chi\u1ebfu m\u1ed9t ch\u00f9m tia s\u00e1ng song song v\u00e0o m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec, theo ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t c\u1ee7a th\u1ea5u k\u00ednh. ","select":["A. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh s\u1ebd loe r\u1ed9ng d\u1ea7n ra.","B. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh s\u1ebd thu nh\u1ecf d\u1ea7n l\u1ea1i.","C. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh c\u00f3 ch\u1ed7 b\u1ecb th\u1eaft l\u1ea1i.","D. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh c\u00f3 ch\u1ed7 tr\u1edf th\u00e0nh ch\u00f9m tia song song."],"hint":"","explain":"<span class='basic_left'>Chi\u1ebfu m\u1ed9t ch\u00f9m tia s\u00e1ng song song v\u00e0o m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec, theo ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t c\u1ee7a th\u1ea5u k\u00ednh.<br\/> Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh s\u1ebd loe r\u1ed9ng d\u1ea7n ra.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3505},{"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":"\u0110\u1eb7t ng\u00f3n tay tr\u01b0\u1edbc m\u1ed9t th\u1ea5u k\u00ednh, r\u1ed3i \u0111\u1eb7t m\u1eaft sau th\u1ea5u k\u00ednh ta th\u1ea5y m\u1ed9t \u1ea3nh l\u1edbn h\u01a1n ch\u00ednh ng\u00f3n tay \u0111\u00f3. \u1ea2nh \u0111\u00f3 l\u00e0 \u1ea3nh th\u1eadt hay \u1ea3nh \u1ea3o?. Th\u1ea5u k\u00ednh l\u00e0 h\u1ed9i t\u1ee5 hay ph\u00e2n k\u00ec? ","select":["A. \u1ea2nh \u0111\u00f3 l\u00e0 \u1ea3nh th\u1eadt, th\u1ea5u k\u00ednh \u0111\u00f3 l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5.","B. \u1ea2nh \u0111\u00f3 l\u00e0 \u1ea3nh \u1ea3o, th\u1ea5u k\u00ednh \u0111\u00f3 l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5.","C. \u1ea2nh \u0111\u00f3 l\u00e0 \u1ea3nh th\u1eadt, th\u1ea5u k\u00ednh \u0111\u00f3 l\u00e0 th\u1ea5u k\u00ednh ph\u00e2n k\u00ec.","D. \u1ea2nh \u0111\u00f3 l\u00e0 \u1ea3nh \u1ea3o, th\u1ea5u k\u00ednh \u0111\u00f3 l\u00e0 th\u1ea5u k\u00ednh ph\u00e2n k\u00ec."],"hint":"","explain":"<span class='basic_left'> \u1ea2nh \u0111\u00f3 l\u00e0 \u1ea3nh \u1ea3o, th\u1ea5u k\u00ednh \u0111\u00f3 l\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5. <br\/>V\u00ec: <br\/>Ta th\u1ea5y TKHT cho \u1ea3nh \u1ea3o l\u1edbn h\u01a1n v\u1eadt<br\/>TKPK cho \u1ea3nh \u1ea3o nh\u1ecf h\u01a1n v\u1eadt, theo d\u1eef ki\u1ec7n b\u00e0i to\u00e1n th\u00ec \u1ea3nh l\u1edbn h\u01a1n v\u1eadt n\u00ean th\u1ea5u k\u00ednh \u0111\u00f3 l\u00e0 TKHT<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3506},{"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":"Di chuy\u1ec3n m\u1ed9t ng\u1ecdn n\u1ebfn d\u1ecdc theo tr\u1ee5c ch\u00ednh c\u1ee7a m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec, r\u1ed3i t\u00ecm \u1ea3nh c\u1ee7a n\u00f3, ta s\u1ebd th\u1ea5y g\u00ec? ","select":["A. C\u00f3 l\u00fac ta thu \u0111\u01b0\u1ee3c \u1ea3nh th\u1eadt, c\u00f3 l\u00fac ta thu \u0111\u01b0\u1ee3c \u1ea3nh th\u1eadt.","B. N\u1ebfu \u0111\u1eb7t ng\u1ecdn n\u1ebfn ngo\u00e0i kho\u1ea3ng ti\u00eau c\u1ef1 c\u1ee7a th\u1ea5u k\u00ednh ta s\u1ebd thu \u0111\u01b0\u1ee3c \u1ea3nh th\u1eadt.","C. Ta ch\u1ec9 thu \u0111\u01b0\u1ee3c \u1ea3nh \u1ea3o, n\u1ebfu \u0111\u1eb7t ng\u1ecdn n\u1ebfn trong kho\u1ea3ng ti\u00eau c\u1ef1 c\u1ee7a th\u1ea5u k\u00ednh.","D. Ta lu\u00f4n lu\u00f4n thu \u0111\u01b0\u1ee3c \u1ea3nh \u1ea3o d\u00f9 \u0111\u1eb7t ng\u1ecdn n\u1ebfn \u1edf b\u1ea5t k\u00ec v\u1ecb tr\u00ed n\u00e0o."],"hint":"","explain":"<span class='basic_left'>\u0110\u1eb7c \u0111i\u1ec3m \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 <br\/>V\u1eadt s\u00e1ng \u0111\u1eb7t \u1edf m\u1ecdi v\u1ecb tr\u00ed tr\u01b0\u1edbc th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 lu\u00f4n cho \u1ea3nh \u1ea3o, c\u00f9ng chi\u1ec1u, nh\u1ecf h\u01a1n v\u1eadt v\u00e0 lu\u00f4n n\u1eb1m trong kho\u1ea3ng ti\u00eau c\u1ef1 c\u1ee7a th\u1ea5u k\u00ednh <br\/>V\u1eadt \u0111\u1eb7t r\u1ea5t xa th\u1ea5u k\u00ednh, \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt c\u00f3 v\u1ecb tr\u00ed c\u00e1ch th\u1ea5u k\u00ednh m\u1ed9t kho\u1ea3ng b\u1eb1ng ti\u00eau c\u1ef1.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":3507},{"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":"\u1ea2nh c\u1ee7a m\u1ed9t ng\u1ecdn n\u1ebfn qua m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec: ","select":["A. C\u00f3 th\u1ec3 l\u00e0 \u1ea3nh th\u1eadt, c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o.","B. Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, nh\u1ecf h\u01a1n ng\u1ecdn n\u1ebfn.","C. Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, l\u1edbn h\u01a1n ng\u1ecdn n\u1ebfn.","D. Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, c\u00f3 th\u1ec3 l\u1edbn ho\u1eb7c nh\u1ecf h\u01a1n ng\u1ecdn n\u1ebfn."],"hint":"","explain":"<span class='basic_left'>\u0110\u1eb7c \u0111i\u1ec3m \u1ea3nh c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 <br\/>V\u1eadt s\u00e1ng \u0111\u1eb7t \u1edf m\u1ecdi v\u1ecb tr\u00ed tr\u01b0\u1edbc th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 lu\u00f4n cho \u1ea3nh \u1ea3o, c\u00f9ng chi\u1ec1u, nh\u1ecf h\u01a1n v\u1eadt v\u00e0 lu\u00f4n n\u1eb1m trong kho\u1ea3ng ti\u00eau c\u1ef1 c\u1ee7a th\u1ea5u k\u00ednh <br\/>V\u1eadt \u0111\u1eb7t r\u1ea5t xa th\u1ea5u k\u00ednh, \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt c\u00f3 v\u1ecb tr\u00ed c\u00e1ch th\u1ea5u k\u00ednh m\u1ed9t kho\u1ea3ng b\u1eb1ng ti\u00eau c\u1ef1. <br\/>N\u00ean ch\u1ecdn \u0111\u00e1p \u00e1n B Ch\u1ec9 c\u00f3 th\u1ec3 l\u00e0 \u1ea3nh \u1ea3o, nh\u1ecf h\u01a1n ng\u1ecdn n\u1ebfn<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":3508},{"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":" Chi\u1ebfu m\u1ed9t ch\u00f9m tia s\u00e1ng song song v\u00e0o m\u1ed9t th\u1ea5u k\u00ednh ph\u00e2n k\u00ec, theo ph\u01b0\u01a1ng vu\u00f4ng g\u00f3c v\u1edbi m\u1eb7t c\u1ee7a th\u1ea5u k\u00ednh.","select":["A. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh s\u1ebd loe r\u1ed9ng d\u1ea7n ra.","B. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh s\u1ebd thu nh\u1ecf d\u1ea7n l\u1ea1i.","C. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh c\u00f3 ch\u1ed7 b\u1ecb th\u1eaft l\u1ea1i.","D. Ch\u00f9m tia kh\u00fac x\u1ea1 ra kh\u1ecfi th\u1ea5u k\u00ednh c\u00f3 ch\u1ed7 tr\u1edf th\u00e0nh ch\u00f9m tia song song."],"hint":"","explain":"<span class='basic_left'><center><img src='https://www.luyenthi123.com/file/luyenthi123/lop9/vatly/bai45/lv2/img\/19a.jpg'\/><\/center><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":3509},{"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":"\u1ea2nh \u1ea3o c\u1ee7a m\u1ed9t v\u1eadt t\u1ea1o b\u1edfi th\u1ea5u k\u00ednh ph\u00e2n k\u1ef3 v\u00e0 th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 gi\u1ed1ng nhau \u1edf ch\u1ed7 ","select":["A. \u0111\u1ec1u c\u00f9ng chi\u1ec1u v\u1edbi v\u1eadt .","B. \u0111\u1ec1u ng\u01b0\u1ee3c chi\u1ec1u v\u1edbi v\u1eadt .","C. \u0111\u1ec1u l\u1edbn h\u01a1n v\u1eadt .","D. \u0111\u1ec1u nh\u1ecf h\u01a1n v\u1eadt . "],"hint":"","explain":"<span class='basic_left'> A - \u0111\u00fang <br\/>B \u2013 sai v\u00ec \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt qua th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 v\u00e0 th\u1ea5u k\u00ednh ph\u00e2n k\u00ec \u0111\u1ec1u c\u00f9ng chi\u1ec1u v\u1edbi v\u1eadt <br\/>C - sai v\u00ec \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt qua th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 l\u1edbn h\u01a1n v\u1eadt c\u00f2n \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt qua th\u1ea5u k\u00ednh ph\u00e2n k\u00ec lu\u00f4n nh\u1ecf h\u01a1n v\u1eadt . <br\/>D - sai v\u00ec \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt qua th\u1ea5u k\u00ednh h\u1ed9i t\u1ee5 l\u1edbn h\u01a1n v\u1eadt c\u00f2n \u1ea3nh \u1ea3o c\u1ee7a v\u1eadt qua th\u1ea5u k\u00ednh ph\u00e2n k\u00ec lu\u00f4n nh\u1ecf h\u01a1n v\u1eadt<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":3510}],"lesson":{"save":0,"level":2}}