Ôn tập chương 8 Những hình hình học cơ bản

Home Lớp 6 Toán lớp 6 - Sách kết nối tri thức Ôn tập chương 8Bài tập nâng cao

{"common":{"save":0,"post_id":"4684","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7412","post_id":"4684","mon_id":"1158113","chapter_id":"1158164","question":"Cho n tia chung g\u1ed1c O, trong \u0111ó không có hai tia nào \u0111\u1ed1i nhau, t\u1ea1o thành 153 góc. Tìm n.  <\/p>","options":["n = 18","n= 17","n = 9"],"correct":"1","level":"3","hint":"Thay vào công th\u1ee9c tính nhanh $\\dfrac{n . (n-1)}{2}$<\/span> = 153 \u0111\u1ec3 tìm n. (chú ý: n<\/strong> và n - 1<\/strong> 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 153 góc. <\/p>Do \u0111ó s\u1ed1 các góc \u0111\u01b0\u1ee3c t\u1ea1o thành là:<\/p>$\\dfrac{n . (n-1)}{2}$<\/span> = 153<\/p>n . (n - 1) = 306<\/p>n . (n - 1) = 18 . 17  (ta th\u1ea5y n và n - 1 là hai s\u1ed1 t\u1ef1 nhiên liên ti\u1ebfp nên phân tích 306 = 18 . 17)<\/p>Suy ra n = 18.<\/p>V\u1eady \u0111áp án là n = 18<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"3","date":"2021-09-09 12:37:54","option_type":"txt","len":0},{"id":"7414","post_id":"4684","mon_id":"1158113","chapter_id":"1158164","question":"B\u1ea1n Nam dùng m\u1ed9t c\u1eady g\u1eady dài 1,5 m \u0111\u1ec3 \u0111o chi\u1ec1u r\u1ed9ng l\u1edbp h\u1ecdc. Sau b\u1ed1n l\u1ea7n \u0111\u1eb7t g\u1eady \u0111o liên ti\u1ebfp thì kho\u1ea3ng cách còn l\u1ea1i gi\u1eefa \u0111\u1ea7u g\u1eady và b\u1ee9c t\u01b0\u1eddng là 0,5 m. H\u1ecfi chi\u1ec1u r\u1ed9ng c\u1ee7a l\u1edbp h\u1ecdc kho\u1ea3ng bao nhiêu \u0111\u1ec1-xi-mét?<\/p>","options":["600 dm","6,5 m","65 dm"],"correct":"3","level":"3","hint":"\u0110\u1ec3 \u0111\u1ed5i t\u1eeb mét sang \u0111\u1ec1-xi-mét, ta nhân v\u1edbi 10.<\/p>","answer":"Vì cây g\u1eady dài 1,5 m và sau b\u1ed1n l\u1ea7n \u0111\u1eb7t g\u1eady \u0111o liên ti\u1ebfp thì kho\u1ea3ng cách còn l\u1ea1i gi\u1eefa \u0111\u1ea7u g\u1eady và b\u1ee9c t\u01b0\u1eddng là 0,5 m nên chi\u1ec1u r\u1ed9ng c\u1ee7a l\u1edbp h\u1ecdc là:<\/p>1,5 x 4 + 0,5 = 6,5 m = 65 dm<\/strong><\/p>V\u1eady \u0111áp án \u0111úng là 65 dm<\/strong><\/span><\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"131","test":"3","date":"2021-09-09 12:53:15","option_type":"txt","len":0},{"id":"7416","post_id":"4684","mon_id":"1158113","chapter_id":"1158164","question":"Ng\u01b0\u1eddi ta coi m\u1ed7i hình là m\u1ed9t t\u1eadp h\u1ee3p \u0111i\u1ec3m. N\u1ebfu A và B là hai \u0111i\u1ec3m phân bi\u1ec7t \u0111ã cho thì m\u1ed7i t\u1eadp h\u1ee3p \u0111i\u1ec3m d\u01b0\u1edbi \u0111ây là hình nào?<\/p>H = {X | X là \u0111i\u1ec3m A, ho\u1eb7c X là \u0111i\u1ec3m B, ho\u1eb7c X là \u0111i\u1ec3m n\u1eb1m cùng phía v\u1edbi B \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m A}.<\/p>","options":["A. <\/strong>Tia AB <svg height=\"60\" width=\"200\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"62\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_6\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"20.9\" x2=\"185.9\" y1=\"24.85\" y2=\"25\"><\/line> <ellipse cx=\"21.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_2\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"144.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_3\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"16.9\" xml:space=\"preserve\" y=\"47.85\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"138.9\" xml:space=\"preserve\" y=\"48.85\">B<\/text> <\/g> <\/svg><\/span>","B. <\/strong>Tia BA <svg height=\"60\" width=\"200\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"62\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_6\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"20.9\" x2=\"185.9\" y1=\"24.85\" y2=\"25\"><\/line> <ellipse cx=\"62.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_2\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"184.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_3\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"55.9\" xml:space=\"preserve\" y=\"51.85\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"176.9\" xml:space=\"preserve\" y=\"48.85\">B<\/text> <\/g> <\/svg><\/span>","C. <\/strong>\u0110o\u1ea1n th\u1eb3ng AB <svg height=\"60\" width=\"200\"> <g>\n<title><\/title>\n<rect fill=\"#fff\" height=\"62\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_6\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g>\n<title><\/title>\n<line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"20.9\" x2=\"185.9\" y1=\"24.85\" y2=\"25\"><\/line> <ellipse cx=\"21.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_2\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"185.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_3\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"16.9\" xml:space=\"preserve\" y=\"47.85\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"173.9\" xml:space=\"preserve\" y=\"49.85\">B<\/text> <\/g> <\/svg><\/span>"],"correct":"1","level":"3","hint":"Tia AB g\u1ed3m \u0111i\u1ec3m A, \u0111i\u1ec3m B và các \u0111i\u1ec3m n\u1eb1m cùng phía v\u1edbi B \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m A<\/p>Tia BA g\u1ed3m \u0111i\u1ec3m B, \u0111i\u1ec3m A và các \u0111i\u1ec3m n\u1eb1m cùng phía v\u1edbi A \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m B<\/p>\u0110o\u1ea1n th\u1eb3ng AB g\u1ed3m \u0111i\u1ec3m A, \u0111i\u1ec3m B và các \u0111i\u1ec3m n\u1eb1m gi\u1eefa A và B<\/p>","answer":"H = {X | X là \u0111i\u1ec3m A, ho\u1eb7c X là \u0111i\u1ec3m B, ho\u1eb7c X là \u0111i\u1ec3m n\u1eb1m cùng phía v\u1edbi B \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m A}.<\/p>H là tia AB vì tia AB g\u1ed3m \u0111i\u1ec3m A, \u0111i\u1ec3m B và các \u0111i\u1ec3m n\u1eb1m cùng phía v\u1edbi B \u0111\u1ed1i v\u1edbi \u0111i\u1ec3m A.<\/strong><\/p>V\u1eady \u0111áp án \u0111úng là A. Tia AB <\/strong><\/span><\/p><svg height=\"60\" width=\"200\"> <g> <title><\/title> <rect fill=\"#fff\" height=\"62\" id=\"canvas_background\" width=\"202\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_6\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g> <title><\/title> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"20.9\" x2=\"185.9\" y1=\"24.85\" y2=\"25\"><\/line> <ellipse cx=\"21.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_2\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"130.4\" cy=\"25.35\" fill=\"#ff0000\" id=\"svg_3\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_4\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"16.9\" xml:space=\"preserve\" y=\"47.85\">A<\/text> <text fill=\"#000000\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"17\" id=\"svg_5\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"122.9\" xml:space=\"preserve\" y=\"49.85\">B<\/text> <\/g> <\/svg><\/span><\/p>","type":"choose_img","extra_type":"","time":"0","user_id":"131","test":"3","date":"2021-09-09 13:10:26"}]}