Góc - Bài tập nâng cao số 2

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Bài 36: GócBài tập nâng cao

{"common":{"save":0,"post_id":"4842","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8861","post_id":"4842","mon_id":"1158113","chapter_id":"1158164","question":"Cho 6 tia có chung g\u1ed1c là \u0111i\u1ec3m O, trong \u0111ó không có hai tia nào \u0111\u1ed1i nhau. H\u1ecfi có bao nhiêu góc \u0111\u01b0\u1ee3c t\u1ea1o thành?<\/p>","options":["15 góc","30 góc","6 góc","5 góc"],"correct":"1","level":"3","hint":"Cho n<\/strong> tia chung g\u1ed1c O, trong \u0111ó không có hai tia nào \u0111\u1ed1i nhau. Khi \u0111ó s\u1ed1 các góc có \u0111\u1ec9nh O \u0111\u01b0\u1ee3c t\u1ea1o thành là  $\\dfrac{n(n-1)}{2}$<\/span><\/p>","answer":"S\u1ed1 các góc t\u1ea1o thành t\u1eeb 6 tia chung g\u1ed1c O mà trong \u0111ó không có hai tia nào \u0111\u1ed1i nhau là <\/p>$\\dfrac{6.(6-1)}{2}=\\dfrac{6.5}{2}=$<\/span> 15 góc<\/p>\u0110áp án \u0111úng là  15 góc<\/strong><\/span><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"131","test":"1","date":"2021-10-09 13:37:41","option_type":"txt","len":0},{"id":"8865","post_id":"4842","mon_id":"1158113","chapter_id":"1158164","question":"Cho n tia chung g\u1ed1c O, trong \u0111ó không có hai tia nào \u0111\u1ed1i nhau. Bi\u1ebft n tia này t\u1ea1o thành 21 góc. Tìm n.<\/strong><\/p>\u0110áp s\u1ed1:  n = <\/b><input class=\"tim_x input_number\" tpl=\"dien_so\" type=\"text\"\/><\/p>","options":"","correct":["[\"7\"]"],"level":"3","hint":"Thay vào công th\u1ee9c tính nhanh $\\dfrac{n(n-1)}{2}=21$<\/span> \u0111\u1ec3 tìm n. (chú ý n và n-1 là hai s\u1ed1 t\u1ef1 nhiên liên ti\u1ebfp nhau)<\/p>","answer":"Cho n tia chung g\u1ed1c O, trong \u0111ó không có hai tia nào \u0111\u1ed1i nhau, t\u1ea1o thành 21 góc. <\/p>Do \u0111ó s\u1ed1 các góc \u0111\u01b0\u1ee3c t\u1ea1o thành là:<\/p>$\\dfrac{n(n-1)}{2}=21$<\/span><\/p>n . (n - 1) = 42<\/p>n . (n - 1) = 7 . 6  (ta th\u1ea5y n và n - 1 là hai s\u1ed1 t\u1ef1 nhiên liên ti\u1ebfp nên phân tích 42 = 7 . 6)<\/p>Suy ra n = 7.<\/p>S\u1ed1 c\u1ea7n \u0111i\u1ec1n là  7<\/strong><\/span><\/p>","type":"blank","extra_type":"","time":"0","user_id":"131","test":"1","date":"2021-10-09 13:43:28"},{"id":"8867","post_id":"4842","mon_id":"1158113","chapter_id":"1158164","question":"Trong hình v\u1ebd có bao nhiêu góc b\u1eb9t?<\/p><svg height=\"200\" width=\"270\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> <g><title><\/title><rect fill=\"#fff\" height=\"202\" id=\"canvas_background\" width=\"272\" 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><image height=\"186\" id=\"svg_2\" width=\"261\" x=\"3.5\" 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\" y=\"8\"><\/image> <\/g> <\/svg><\/span><\/p>","options":["5","2","3","4"],"correct":"1","level":"3","hint":"","answer":"Trong hình v\u1ebd có 5 góc b\u1eb9t là:  góc mAn, góc mBn, góc xAy và góc zBt, góc xDy<\/p>\u0110áp án \u0111úng là  5<\/strong><\/span><\/p>","type":"choose","extra_type":"star","time":"0","user_id":"131","test":"1","date":"2021-10-09 13:48:08","option_type":"txt","len":0}]}