Hình thang. Diện tích hình thang

Home Lớp 5 Toán lớp 5 - Sách Kết nối tri thức Bài 26. Hình thang. Diện tích hình thang.Bài tập nâng cao

{"common":{"save":0,"post_id":"7701","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"1834","post_id":"7701","mon_id":"1159414","chapter_id":"1159460","question":"Tính di\u1ec7n tích hình thang có \u0111áy bé b\u1eb1ng 42 cm, chi\u1ec1u cao g\u1ea5p 0,3 l\u1ea7n \u0111áy bé và g\u1ea5p 0,2 l\u1ea7n \u0111áy l\u1edbn.<\/p>","options":["A.<\/strong> 661,5 cm²","B.<\/strong> 660,5 cm²","C.<\/strong> 662,5 cm²","D.<\/strong> 656,5 cm²"],"correct":"1","level":"3","hint":"","answer":"Ch\u1ecdn A.<\/strong> 661,5 cm²<\/span><\/p>Chi\u1ec1u cao hình thang là:<\/p>42 x 0,3 = 12,6 (cm)<\/p>\u0110\u1ed9 dài \u0111áy l\u1edbn là:<\/p>12,6 : 0,2 = 63 (cm)<\/p>Di\u1ec7n tích c\u1ee7a hình thang \u0111ó là:<\/p>$S=\\dfrac{(42+63)\\times 12,6}{2}=661,5$<\/span> (cm²)<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-22 05:15:48","option_type":"txt","len":2},{"id":"1837","post_id":"7701","mon_id":"1159414","chapter_id":"1159460","question":"Cho hình ch\u1eef nh\u1eadt ABCD có AB = 24 cm; BC = 10 cm. \u0110i\u1ec3m N thu\u1ed9c c\u1ea1nh AB sao cho AN = $\\dfrac{2}{3}$<\/span>AB.<\/p><svg height=\"160\" width=\"262\"> <g><title><\/title><rect fill=\"#fff\" height=\"162\" id=\"canvas_background\" width=\"264\" 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><g id=\"svg_10\"> <rect fill=\"#aaffaa\" height=\"127\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"213\" x=\"25.5\" y=\"28.25\"><\/rect> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"4.5\" xml:space=\"preserve\" y=\"22.25\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"239.5\" xml:space=\"preserve\" y=\"23.25\">B<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"242.5\" xml:space=\"preserve\" y=\"152.25\">C<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"1.5\" xml:space=\"preserve\" y=\"155.25\">D<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"157.5\" xml:space=\"preserve\" y=\"22.25\">N<\/text> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"164.5\" x2=\"237.5\" y1=\"29.25\" y2=\"155.25\"><\/line> <\/g> <\/g> <\/svg><\/span><\/p>","options":["A.<\/strong> 160 cm²","B.<\/strong> 165 cm²","C.<\/strong> 190 cm²","D.<\/strong> 200 cm²"],"correct":"4","level":"3","hint":"","answer":"Ch\u1ecdn D.<\/strong> 200 cm²<\/span><\/p>\u0110\u1ed9 dài c\u1ea1nh AN là:<\/p>$\\dfrac{2}{3}$<\/span> x 24 = 16 (cm)<\/p>Di\u1ec7n tích c\u1ee7a hình thang ANCD là:<\/p>$S=\\dfrac{(16+24)\\times 10}{2}=200$<\/span> (cm²)<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-22 05:20:45","option_type":"txt","len":1},{"id":"1838","post_id":"7701","mon_id":"1159414","chapter_id":"1159460","question":"Trung bình c\u1ed9ng hai \u0111áy hình thang là 18,5 m. Bi\u1ebft \u0111\u1ed9 dài \u0111áy l\u1edbn là 24 m. Chi\u1ec1u cao b\u1eb1ng $\\dfrac{3}{4}$<\/span> \u0111áy l\u1edbn. V\u1eady di\u1ec7n tích hình thang \u0111ó là:<\/p>","options":["A.<\/strong> 332 m²","B.<\/strong> 330 m²","C.<\/strong> 333 m²","D.<\/strong> 320 m²"],"correct":"3","level":"3","hint":"","answer":"Ch\u1ecdn C.<\/strong> 333 m²<\/span><\/p>T\u1ed5ng \u0111\u1ed9 dài hai \u0111áy c\u1ee7a hình thang là: 18,5 x 2 = 37 (m)<\/p>\u0110\u1ed9 dài \u0111áy nh\u1ecf c\u1ee7a hình thang là: 37 – 24 = 13 (m)<\/p>Chi\u1ec1u cao hình thang là: $\\dfrac{3}{4}$<\/span> x 24 = 18 (m)<\/p>Di\u1ec7n tích c\u1ee7a hình thang là:<\/p>$S=\\dfrac{(13 + 24)\\times 18}{2}=333$<\/span> (m²)<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"0","date":"2024-09-22 05:27:06","option_type":"txt","len":1}]}