Điểm ở giữa, trung điểm của đoạn thẳng

Home Toán lớp 3 - Tập 1 CHỦ ĐỀ 3 - LÀM QUEN VỚI HÌNH PHẲNG, HÌNH KHỐI Bài 16: Điểm ở giữa, trung điểm của đoạn thẳngBài tập cơ bản

{"common":{"save":0,"post_id":"6083","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"2291","post_id":"6083","mon_id":"1158530","chapter_id":"1158594","question":"Kh\u1eb3ng \u0111\u1ecbnh d\u01b0\u1edbi \u0111ây \u0111úng hay sai:<\/p>C là trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB. <\/span><\/p><svg height=\"58\" width=\"280\"> <g><title><\/title><rect fill=\"#fff\" height=\"60\" id=\"canvas_background\" width=\"282\" 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><ellipse cx=\"35.15792\" cy=\"35.56242\" fill=\"#fff\" id=\"svg_4\" rx=\"1\" ry=\"1.08758\" stroke=\"#000\" stroke-width=\"2.5\" transform=\"rotate(1 35.15791702270488,35.5624198913571) \"><\/ellipse> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"32.9\" x2=\"267.9\" y1=\"35.65\" y2=\"36.65\"><\/line> <ellipse cx=\"133.16759\" cy=\"35.56242\" fill=\"#fff\" id=\"svg_2\" rx=\"1\" ry=\"1.08758\" stroke=\"#000\" stroke-width=\"2.5\"><\/ellipse> <ellipse cx=\"266.00304\" cy=\"36.55744\" fill=\"#fff\" id=\"svg_3\" rx=\"1\" ry=\"1.08758\" stroke=\"#000\" stroke-width=\"2.5\"><\/ellipse> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.7368001654533886,0,0,0.6778093547417541,18.285775193859994,22.21017583163766) \" x=\"14.42838\" xml:space=\"preserve\" y=\"45.373\">A<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.7368001654533884,0,0,0.6778093547417541,115.7979352566499,21.71266483219652) \" x=\"14.42838\" xml:space=\"preserve\" y=\"45.373\">C<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" transform=\"matrix(0.7368001654533884,0,0,0.6778093547417541,248.6333856674928,21.712664802394194) \" x=\"14.42838\" xml:space=\"preserve\" y=\"45.373\">B<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.6699293306107776,0,0,0.6139432095129356,29.917773678138484,2.765721860804539) \" x=\"53.7706\" xml:space=\"preserve\" y=\"41.74818\">4cm<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.6699293306107775,0,0,0.5832612946655061,156.28557915909548,4.79027305691103) \" x=\"53.7706\" xml:space=\"preserve\" y=\"41.74818\">5cm<\/text> <\/g> <\/svg><\/span><\/p>","options":["\u0110úng","Sai"],"correct":"2","level":"1","hint":"","answer":"Ta có C n\u1eb1m gi\u1eefa A và B.<\/p>AC = 4cm và CB= 5cm<\/p>AC không b\u1eb1ng CB nên C không ph\u1ea3i là trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AB.<\/p>\u0110áp án c\u1ea7n ch\u1ecdn là: Sai<\/strong><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"129","test":"1","date":"2022-08-10 15:32:05","option_type":"txt","len":1},{"id":"2292","post_id":"6083","mon_id":"1158530","chapter_id":"1158594","question":"Nh\u1eefng kh\u1eb3ng \u0111\u1ecbnh nào sau \u0111ây là \u0111úng?<\/p><svg height=\"58\" width=\"280\"> <g><title><\/title><rect fill=\"#fff\" height=\"60\" id=\"canvas_background\" width=\"282\" 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><ellipse cx=\"35.15792\" cy=\"35.56242\" fill=\"#fff\" id=\"svg_4\" rx=\"1\" ry=\"1.08758\" stroke=\"#000\" stroke-width=\"2.5\" transform=\"rotate(1 35.15791702270488,35.5624198913571) \"><\/ellipse> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"32.9\" x2=\"267.9\" y1=\"35.65\" y2=\"36.65\"><\/line> <ellipse cx=\"133.16759\" cy=\"35.56242\" fill=\"#fff\" id=\"svg_2\" rx=\"1\" ry=\"1.08758\" stroke=\"#000\" stroke-width=\"2.5\"><\/ellipse> <ellipse cx=\"266.00304\" cy=\"36.55744\" fill=\"#fff\" id=\"svg_3\" rx=\"1\" ry=\"1.08758\" stroke=\"#000\" stroke-width=\"2.5\"><\/ellipse> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.7368001654533886,0,0,0.6778093547417541,18.285775193859994,22.21017583163766) \" x=\"14.42838\" xml:space=\"preserve\" y=\"45.373\">A<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.7368001654533884,0,0,0.6778093547417541,115.7979352566499,21.71266483219652) \" x=\"14.42838\" xml:space=\"preserve\" y=\"45.373\">C<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" transform=\"matrix(0.7368001654533884,0,0,0.6778093547417541,248.6333856674928,21.712664802394194) \" x=\"14.42838\" xml:space=\"preserve\" y=\"45.373\">B<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.6699293306107776,0,0,0.6139432095129356,29.917773678138484,2.765721860804539) \" x=\"53.7706\" xml:space=\"preserve\" y=\"41.74818\">4cm<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.6699293306107775,0,0,0.5832612946655061,156.28557915909548,4.79027305691103) \" x=\"53.7706\" xml:space=\"preserve\" y=\"41.74818\">5cm<\/text> <\/g> <\/svg><\/span><\/p>","options":["Ba \u0111i\u1ec3m A, B, C th\u1eb3ng hàng","C là \u0111i\u1ec3m \u1edf gi\u1eefa 2 \u0111i\u1ec3m A và B","B là trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng AC","\u0110\u1ed9 dài \u0111o\u1ea1n th\u1eb3ng AC b\u1eb1ng \u0111\u1ed9 dài \u0111o\u1ea1n th\u1eb3ng CB"],"correct":"[\"1\",\"2\"]","level":"1","hint":"","answer":"Các kh\u1eb3ng \u0111\u1ecbnh \u0111úng là:<\/p>Ba \u0111i\u1ec3m A, B, C th\u1eb3ng hàng;<\/strong><\/span><\/p>C là \u0111i\u1ec3m \u1edf gi\u1eefa 2 \u0111i\u1ec3m A và B<\/strong><\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"129","test":"1","date":"2022-08-10 15:45:12","option_type":"txt","len":3},{"id":"2293","post_id":"6083","mon_id":"1158530","chapter_id":"1158594","question":"Cho \u0111o\u1ea1n th\u1eb3ng sau. Nh\u1eefng kh\u1eb3ng \u0111\u1ecbnh nào sau \u0111ây \u0111úng?<\/p><svg height=\"66\" width=\"298\"> <g><title><\/title><rect fill=\"#fff\" height=\"68\" id=\"canvas_background\" width=\"300\" 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><ellipse cx=\"160.1191\" cy=\"39.66277\" fill=\"#fff\" id=\"svg_2\" rx=\"2.2191\" ry=\"1.69103\" stroke=\"#000\" stroke-width=\"3\"><\/ellipse> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"3\" x1=\"33.16352\" x2=\"288.16352\" y1=\"40.40282\" y2=\"40.40282\"><\/line> <ellipse cx=\"285.07762\" cy=\"40.01007\" fill=\"#32320F\" id=\"svg_3\" rx=\"2.2191\" ry=\"1.69103\" stroke=\"#000\" stroke-width=\"3\"><\/ellipse> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.9399470686912537,0,0,0.9114541411399841,9.210029136066623,6.043129890207183) \" x=\"151.83072\" xml:space=\"preserve\" y=\"60.87113\">E<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.9399470686912537,0,0,0.9114541411399841,9.210029136066623,6.043129890207183) \" x=\"12.70608\" xml:space=\"preserve\" y=\"61.92608\">D<\/text> <ellipse cx=\"29.22088\" cy=\"40.46462\" fill=\"#3B2F0E\" id=\"svg_4\" rx=\"2.2191\" ry=\"1.69103\" stroke=\"#000\" stroke-width=\"3\"><\/ellipse> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" style=\"cursor: move;\" text-anchor=\"start\" transform=\"matrix(0.9399470686912537,0,0,0.9114541411399841,9.210029136066623,6.043129890207183) \" x=\"284.30602\" xml:space=\"preserve\" y=\"59.81617\">F<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.883342683315277,0,0,0.7765500041478055,9.31817937320875,8.028742957795467) \" x=\"71.0898\" xml:space=\"preserve\" y=\"29.61576\">3cm<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" transform=\"matrix(0.883342683315277,0,0,0.8077150018824322,9.31817937320875,6.815747044794694) \" x=\"219.67377\" xml:space=\"preserve\" y=\"30.2889\">3cm<\/text> <\/g> <\/svg><\/span><\/p>","options":["D, E, F th\u1eb3ng hàng","DE = EF","E là trung \u0111i\u1ec3m c\u1ee7a \u0111o\u1ea1n th\u1eb3ng DF","E là \u0111i\u1ec3m n\u1eb1m gi\u1eefa D và F"],"correct":"[\"1\",\"2\",\"3\",\"4\"]","level":"1","hint":"","answer":"C\u1ea3 4<\/strong> kh\u1eb3ng \u0111\u1ecbnh trên \u0111\u1ec1u \u0111úng. Vì:<\/p>D, E, F cùng th\u1eb3ng hàng;<\/span><\/p>và DE = EF = 3cm.<\/span><\/p>","type":"checkbox","extra_type":"classic-checkbox","time":"0","user_id":"129","test":"3","date":"2022-08-10 16:04:00","option_type":"txt","len":2}]}