Ôn tập chương 4 Hình học phẳng- Bài tập nâng cao số 1

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Ôn tập chương 4: Một số hình phẳng trong thực tiễnBài tập nâng cao

{"common":{"save":0,"post_id":"4621","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6908","post_id":"4621","mon_id":"1158113","chapter_id":"1158129","question":"Trong m\u1ea3nh v\u01b0\u1eddn hình ch\u1eef nh\u1eadt có chi\u1ec1u dài là 12 m, chi\u1ec1u r\u1ed9ng là 9 m. Ng\u01b0\u1eddi ta tr\u1ed3ng hoa h\u1ed3ng trên m\u1ea3nh \u0111\u1ea5t hình thoi nh\u01b0 hình bên. N\u1ebfu m\u1ed7i mét vuông tr\u1ed3ng \u0111\u01b0\u1ee3c 5 cây hoa thì tr\u1ed3ng \u0111\u01b0\u1ee3c bao nhiêu cây hoa trên m\u1ea3nh \u0111\u1ea5t \u0111ó?<\/p><svg height=\"120\" width=\"200\"> <g><title><\/title><rect fill=\"#fff\" height=\"122\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_5\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#56ff56\" height=\"96\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"165.00001\" x=\"7.9\" y=\"6.85\"><\/rect> <path d=\"m10.75551,55.17075l80.50001,-45.5l80.50001,45.5l-80.50001,45.5l-80.50001,-45.5z\" fill=\"#ffd4aa\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"73.9\" xml:space=\"preserve\" y=\"117.85\">12 m<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 183.3984375,51.65625000000002) \" x=\"170.9\" xml:space=\"preserve\" y=\"56.85\">9 m<\/text> <\/g> <\/svg><\/span><\/p>","options":["280 cây","270 cây","54 cây"],"correct":"2","level":"3","hint":"Tính di\u1ec7n tích c\u1ee7a m\u1ea3nh \u0111\u1ea5t hình thoi.<\/p>S\u1ed1 cây hoa tr\u1ed3ng \u0111\u01b0\u1ee3c = Di\u1ec7n tích m\u1ea3nh \u0111\u1ea5t hình thoi x 5 cây hoa<\/p>","answer":"D\u1ef1a vào hình v\u1ebd ta th\u1ea5y m\u1ea3nh \u0111\u1ea5t hình thoi có \u0111\u1ed9 dài hai \u0111\u01b0\u1eddng chéo l\u1ea7n l\u01b0\u1ee3t là 12 m và 9 m.<\/p>Di\u1ec7n tích m\u1ea3nh \u0111\u1ea5t hình thoi là:<\/p>S = $\\dfrac{1}{2}$<\/span> . 12 . 9 = 54 (m$^2$<\/span>)<\/p>S\u1ed1 cây hoa tr\u1ed3ng \u0111\u01b0\u1ee3c trên m\u1ea3nh \u0111\u1ea5t \u0111ó là:<\/p>54 . 5 = 270 (cây)<\/p>V\u1eady \u0111áp án là 270 cây<\/strong><\/span><\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"132","test":"3","date":"2021-08-30 12:37:14","option_type":"txt","len":0},{"id":"6909","post_id":"4621","mon_id":"1158113","chapter_id":"1158129","question":"Ng\u01b0\u1eddi ta dùng m\u1ed9t lo\u1ea1i g\u1ea1ch men hình vuông c\u1ea1nh 40 cm \u0111\u1ec3 lát n\u1ec1n cho m\u1ed9t c\u0103n phòng hình ch\u1eef nh\u1eadt có kích th\u01b0\u1edbc nh\u01b0 hình v\u1ebd. Tính s\u1ed1 viên g\u1ea1ch c\u1ea7n dùng.<\/p><svg height=\"130\" width=\"200\"> <g><title><\/title><rect fill=\"#fff\" height=\"132\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" height=\"100%\" id=\"canvasGrid\" overflow=\"visible\" width=\"100%\" x=\"0\" y=\"0\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#ffd4aa\" height=\"100\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"164\" x=\"24.9\" y=\"14.85\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"93.9\" xml:space=\"preserve\" y=\"34.85\">40 m<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 12.570312500000016,66.65625000000001) \" x=\"-4.1\" xml:space=\"preserve\" y=\"71.85\">30 m<\/text> <\/g> <\/svg><\/span>  <svg height=\"60\" width=\"80\"> <g><title><\/title><rect fill=\"#fff\" height=\"62\" id=\"canvas_background\" width=\"82\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_4\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#56ff56\" height=\"40\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"40\" x=\"9.9\" y=\"10.85\"><\/rect> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"9.9\" x2=\"32.9\" y1=\"24.85\" y2=\"50.85\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"26.9\" x2=\"49.9\" y1=\"10.85\" y2=\"36.85\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"10\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(90 59.75,16.648437500000007) \" x=\"45.9\" xml:space=\"preserve\" y=\"19.85\">40 cm<\/text> <\/g> <\/svg><\/span><\/p>","options":["7500 viên ","7550 viên","1200 viên "],"correct":"1","level":"3","hint":"B\u01b0\u1edbc 1: Tính di\u1ec7n tích c\u0103n phòng hình ch\u1eef nh\u1eadt và di\u1ec7n tích m\u1ed9t viên g\u1ea1ch hình vuông<\/p>B\u01b0\u1edbc 2: \u0110\u01b0a hai di\u1ec7n tích trên v\u1ec1 cùng m\u1ed9t \u0111\u01a1n v\u1ecb cm$^2$<\/span> ho\u1eb7c m$^2$<\/span><\/p>B\u01b0\u1edbc 3: Tính s\u1ed1 viên g\u1ea1ch c\u1ea7n dùng = Di\u1ec7n tích c\u0103n phòng : Di\u1ec7n tích m\u1ed9t viên g\u1ea1ch<\/p>","answer":"Di\u1ec7n tích m\u1ed9t viên g\u1ea1ch hình vuông c\u1ea1nh 40 cm là:<\/p>40$^2$<\/span> = 1600 (cm$^2$<\/span>)<\/p>Di\u1ec7n tích n\u1ec1n c\u1ee7a c\u0103n phòng hình ch\u1eef nh\u1eadt kích th\u01b0\u1edbc 30 x 40 là:<\/p>40 . 30 = 1200 (m$^2$<\/span>) = 12 000 000 (cm$^2$<\/span>)<\/p>S\u1ed1 viên g\u1ea1ch c\u1ea7n dùng là:<\/p>12 000 000 : 1600 = 7500 (viên)<\/p>V\u1eady \u0111áp án \u0111úng là 7500 viên<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-08-30 12:51:35","option_type":"txt","len":2},{"id":"6912","post_id":"4621","mon_id":"1158113","chapter_id":"1158129","question":"M\u1ed9t m\u1ea3nh v\u01b0\u1eddn hình ch\u1eef nh\u1eadt có kích th\u01b0\u1edbc nh\u01b0 hình v\u1ebd. Ng\u01b0\u1eddi ta làm m\u1ed9t l\u1ed1i \u0111i xung quanh v\u01b0\u1eddn r\u1ed9ng 2 m thu\u1ed9c \u0111\u1ea5t c\u1ee7a v\u01b0\u1eddn. Ph\u1ea7n \u0111\u1ea5t còn l\u1ea1i dùng \u0111\u1ec3 tr\u1ed3ng tr\u1ecdt. Tính di\u1ec7n tích \u0111\u1ea5t tr\u1ed3ng c\u1ee7a m\u1ea3nh v\u01b0\u1eddn.<\/p><svg height=\"200\" width=\"350\"> <g><title><\/title><rect fill=\"#fff\" height=\"202\" id=\"canvas_background\" width=\"352\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_9\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#ffaa56\" height=\"155.99999\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"289.99999\" x=\"29.9\" y=\"25.85\"><\/rect> <rect fill=\"#aaff56\" height=\"95\" id=\"svg_2\" stroke=\"#000\" stroke-width=\"1.5\" width=\"227\" x=\"61.9\" y=\"57.85\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"136.9\" xml:space=\"preserve\" y=\"18.85\">30 m<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"rotate(-90 17.570312500000018,96.65625000000001) \" x=\"0.9\" xml:space=\"preserve\" y=\"101.85\">25 m<\/text> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"288.9\" x2=\"318.9\" y1=\"57.85\" y2=\"57.85\"><\/line> <line fill=\"none\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"288.9\" x2=\"288.9\" y1=\"24.85\" y2=\"60\"><\/line> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"300.9\" xml:space=\"preserve\" y=\"74.85\">2<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"274.9\" xml:space=\"preserve\" y=\"46.85\">2<\/text> <\/g> <\/svg><\/span><\/p>","options":["644 m$^2$<\/span>","750 m$^2$<\/span>","546 m$^2$<\/span>"],"correct":"3","level":"3","hint":"Ph\u1ea7n \u0111\u1ea5t tr\u1ed3ng c\u0169ng có d\u1ea1nh hình ch\u1eef nh\u1eadt, trong \u0111ó:<\/p>Chi\u1ec1u r\u1ed9ng c\u1ee7a nó = Chi\u1ec1u r\u1ed9ng c\u1ee7a v\u01b0\u1eddn - 4 m  (tr\u1eeb \u0111i 4 m vì hai bên l\u1ed1i \u0111i m\u1ed7i bên r\u1ed9ng 2m)<\/p>Chi\u1ec1u dài c\u1ee7a nó = Chi\u1ec1u dài c\u1ee7a v\u01b0\u1eddn - 4 m<\/p>","answer":"Ph\u1ea7n \u0111\u1ea5t tr\u1ed3ng tr\u1ecdt có d\u1ea1ng hình ch\u1eef nh\u1eadt, trong \u0111ó:<\/p>+ Chi\u1ec1u r\u1ed9ng là: 25 - 4 = 21 m  <\/p>+ Chi\u1ec1u dài là: 30 - 4 = 26 m<\/p>Di\u1ec7n tích ph\u1ea7n \u0111\u1ea5t tr\u1ed3ng tr\u1ecdt là:<\/p>21 . 26 = 546 (m$^2$<\/span>)<\/p>V\u1eady \u0111áp án là 546 m$^2$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"132","test":"3","date":"2021-08-30 13:09:07","option_type":"math","len":0}]}