Chu vi và diện tích của một số tứ giác đã học

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Bài 20: Chu vi và diện tích của một số tứ giác đã họcBài tập cơ bản

{"common":{"save":0,"post_id":"4784","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8076","post_id":"4784","mon_id":"1158113","chapter_id":"1158129","question":"Chu vi c\u1ee7a hình ch\u1eef nh\u1eadt có chi\u1ec1u r\u1ed9ng là 15 m, chi\u1ec1u dài là 20 m là bao nhiêu? (kí hi\u1ec7u C là chu vi)<\/p><img src=\"https:\/\/www.luyenthi123.com\/data\/library\/hinh-hoc\/cn.png\" style=\"width: 100px; height: 62px;\" \/><\/p>","options":["C = 70 m$^2$<\/span>","C = 35 m","C = 70 m"],"correct":"3","level":"1","hint":"Chu vi hình ch\u1eef nh\u1eadt là C = 2 . (a + b)<\/p>(a, b là chi\u1ec1u r\u1ed9ng và chi\u1ec1u dài c\u1ee7a hình ch\u1eef nh\u1eadt)<\/p>Chú ý: \u0111\u01a1n v\u1ecb c\u1ee7a chu vi là \u0111\u01a1n v\u1ecb c\u1ee7a \u0111\u1ed9 dài c\u1ea1nh (cm, dm, m, ...)<\/p>","answer":"Chu vi c\u1ee7a hình ch\u1eef nh\u1eadt là:<\/p>C = 2 . (15 + 20) = 70 (m)<\/p>V\u1eady \u0111áp án \u0111úng là C = 70 m<\/strong><\/span><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"132","test":"1","date":"2021-10-02 14:51:47","option_type":"math","len":0},{"id":"8079","post_id":"4784","mon_id":"1158113","chapter_id":"1158129","question":"Tính di\u1ec7n tích hình thoi MNPQ có hai \u0111\u01b0\u1eddng chéo MP = 25 mm và NQ = 36 mm.<\/p><svg height=\"130\" width=\"220\"> <g><title><\/title><rect fill=\"#fff\" height=\"132\" id=\"canvas_background\" width=\"222\" 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><path d=\"m4.8005,57.28075l96.5,-48.5l96.5,48.5l-96.5,48.5l-96.5,-48.5z\" fill=\"#fff\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_2\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"95.9\" xml:space=\"preserve\" y=\"121.85\">M<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"6.9\" xml:space=\"preserve\" y=\"79.85\">N<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"79.9\" xml:space=\"preserve\" y=\"14.85\">P<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"196.9\" xml:space=\"preserve\" y=\"72.85\">Q<\/text> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_6\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"100.9\" x2=\"100.9\" y1=\"8.85\" y2=\"104.85\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_7\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"4.9\" x2=\"196.9\" y1=\"57\" y2=\"56.85\"><\/line> <\/g> <\/svg><\/span><\/p>","options":["900 mm$^2$<\/span>","450 mm","450 mm$^2$<\/span>"],"correct":"3","level":"1","hint":"Công th\u1ee9c tính di\u1ec7n tích hình thoi có \u0111\u1ed9 dài hai \u0111\u01b0\u1eddng chéo là a, b:<\/p>S = $\\dfrac{1}{2}$<\/span> . a . b<\/p>","answer":"Di\u1ec7n tích hình thoi MNPQ là: <\/p>S = $\\dfrac{1}{2}$<\/span> . MP . NQ = $\\dfrac{1}{2}$<\/span> . 25 . 36 = 450 (mm$^2$<\/span>)<\/p>V\u1eady \u0111áp án \u0111úng là 450 mm$^2$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-10-02 15:04:18","option_type":"math","len":0},{"id":"8080","post_id":"4784","mon_id":"1158113","chapter_id":"1158129","question":"Tính di\u1ec7n tích hình vuông có c\u1ea1nh 15 dm. (Kí hi\u1ec7u S là di\u1ec7n tích)<\/p>","options":["225 dm","225 dm$^2$<\/span>","60 dm$^2$<\/span>"],"correct":"2","level":"1","hint":"Di\u1ec7n tích hình vuông có c\u1ea1nh a là:<\/p>S = a$^2$<\/span><\/p>","answer":"Di\u1ec7n tích hình vuông là:<\/p>S = 15$^2$<\/span> = 225 (dm$^2$<\/span>)<\/p>V\u1eady \u0111áp án \u0111úng là 225 dm$^2$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"132","test":"1","date":"2021-10-02 15:10:45","option_type":"math","len":0}]}