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

Home Toán lớp 6 (Sách KNTT)Toán lớp 6 Tập 1 Bài 20: Chu vi và diện tích của một số tứ giác đã họcBài tập trung bình

{"common":{"save":0,"post_id":"4785","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8093","post_id":"4785","mon_id":"1158113","chapter_id":"1158129","question":"Tính chu vi c\u1ee7a hình ch\u1eef nh\u1eadt ABCD, bi\u1ebft AD = 14 dm ; AB = 3 . AD<\/p><svg height=\"130\" width=\"300\"> <g><title><\/title><rect fill=\"#fff\" height=\"132\" id=\"canvas_background\" width=\"302\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_7\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#fff\" height=\"93\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"255\" x=\"25.9\" y=\"19.85\"><\/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=\"10.9\" xml:space=\"preserve\" y=\"23.85\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"10.9\" xml:space=\"preserve\" y=\"119.85\">D<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"282.9\" xml:space=\"preserve\" y=\"16.85\">B<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"283.9\" xml:space=\"preserve\" y=\"119.85\">C<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"28.9\" xml:space=\"preserve\" y=\"70.85\">14 dm<\/text> <\/g> <\/svg><\/span><\/p>Chu vi là: C = <input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/> dm<\/strong><\/p>","options":"","correct":["[\"112\"]"],"level":"2","hint":"Tìm \u0111\u1ed9 dài c\u1ea1nh AB r\u1ed3i tính chu vi c\u1ee7a hình ch\u1eef nh\u1eadt.<\/p>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>","answer":"Ta có: AB = 3 . AD = 3 . 14 = 42 (dm)<\/p>Chu vi c\u1ee7a hình ch\u1eef nh\u1eadt là:<\/p>C = 2 . (AD + AB) = 2 . (14 + 42) = 112 (dm)<\/p>V\u1eady s\u1ed1 c\u1ea7n \u0111i\u1ec1n là 112<\/strong><\/span>.<\/p>","type":"blank","extra_type":"","time":"0","user_id":"132","test":"1","date":"2021-10-03 02:04:16"},{"id":"8095","post_id":"4785","mon_id":"1158113","chapter_id":"1158129","question":"Tính di\u1ec7n tích c\u1ee7a hình ch\u1eef nh\u1eadt ABCD, bi\u1ebft c\u1ea1nh AD = 14 dm và \u0111\u1ed9 dài c\u1ea1nh  AB g\u1ea5p 3 l\u1ea7n c\u1ea1nh AD (Kí hi\u1ec7u S là di\u1ec7n tích).<\/p><svg height=\"130\" width=\"300\"> <g><title><\/title><rect fill=\"#fff\" height=\"132\" id=\"canvas_background\" width=\"302\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_7\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><rect fill=\"#fff\" height=\"93\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"255\" x=\"25.9\" y=\"19.85\"><\/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=\"10.9\" xml:space=\"preserve\" y=\"23.85\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_3\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"10.9\" xml:space=\"preserve\" y=\"119.85\">D<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"282.9\" xml:space=\"preserve\" y=\"16.85\">B<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"283.9\" xml:space=\"preserve\" y=\"119.85\">C<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"15\" id=\"svg_6\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"28.9\" xml:space=\"preserve\" y=\"70.85\">14 dm<\/text> <\/g> <\/svg><\/span><\/p>","options":["S = 588 dm","S = 588 dm$^2$<\/span>","S = 294 dm$^2$<\/span>"],"correct":"2","level":"2","hint":"Tìm \u0111\u1ed9 dài c\u1ea1nh AB r\u1ed3i tính di\u1ec7n tích c\u1ee7a hình ch\u1eef nh\u1eadt.<\/p>Di\u1ec7n tích hình ch\u1eef nh\u1eadt là S = a . b<\/p>(a, b là chi\u1ec1u r\u1ed9ng và chi\u1ec1u dài c\u1ee7a hình ch\u1eef nh\u1eadt)<\/p>","answer":"Ta có: AB = 3 . AD = 3 . 14 = 42 (dm)<\/p>Di\u1ec7n tích hình ch\u1eef nh\u1eadt là:<\/p>S = AD . AB = 14 . 42 = 588 (dm$^2$<\/span>)<\/p>V\u1eady \u0111áp án \u0111úng là S = 588 dm$^2$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"132","test":"3","date":"2021-10-03 02:08:46","option_type":"math","len":0},{"id":"8096","post_id":"4785","mon_id":"1158113","chapter_id":"1158129","question":"Tính chu vi và di\u1ec7n tích hình vuông có \u0111\u1ed9 dài c\u1ea1nh là 11 cm. (Kí hi\u1ec7u C là chu vi, S là di\u1ec7n tích)<\/p><svg height=\"150\" width=\"160\"> <g><title><\/title><rect fill=\"#fff\" height=\"152\" id=\"canvas_background\" width=\"162\" 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=\"#ffaaff\" height=\"136\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\" width=\"136\" x=\"12.9\" y=\"5.85\"><\/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=\"53.9\" xml:space=\"preserve\" y=\"24.85\">11 cm<\/text> <\/g> <\/svg><\/span><\/p>","options":["C = 121 cm, S = 44 cm$^2$<\/span>","C = 44 cm$^2$<\/span>, S = 121 cm","C = 44 cm, S = 121 cm$^2$<\/span>"],"correct":"3","level":"2","hint":"Hình vuông có c\u1ea1nh a thì có:<\/p>    Chu vi là C = 4 . a<\/p>    Di\u1ec7n tích là S = a$^2$<\/span><\/p>","answer":"Chu vi c\u1ee7a hình vuông là:<\/p>C = 4 . 11 = 44 (cm)<\/p>Di\u1ec7n tích c\u1ee7a hình vuông là:<\/p>S = 11$^2$<\/span> = 121 (cm$^2$<\/span>)<\/p>V\u1eady \u0111áp án \u0111úng là C = 44 cm, S = 121 cm$^2$<\/span><\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"132","test":"3","date":"2021-10-03 02:14:42","option_type":"math","len":0}]}