{"common":{"save":0,"post_id":"5834","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8646","post_id":"5834","mon_id":"1158532","chapter_id":"1158662","question":"<p>Cho \u0111i\u1ec3m A n\u1eb1m ngoài \u0111\u01b0\u1eddng th\u1eb3ng d. H\u1ecfi có th\u1ec3 v\u1ebd \u0111\u01b0\u1ee3c bao nhiêu \u0111\u01b0\u1eddng vuông góc k\u1ebb t\u1eeb A \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng d?<\/p>","options":["2","0","1","Vô s\u1ed1"],"correct":"3","level":"2","hint":"<p>Qua m\u1ed9t \u0111i\u1ec3m n\u1eb1m ngoài m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng d, có duy nh\u1ea5t m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng vuông góc v\u1edbi \u0111\u01b0\u1eddng th\u1eb3ng d.<\/p>","answer":"<p>Cho \u0111i\u1ec3m A n\u1eb1m ngoài \u0111\u01b0\u1eddng th\u1eb3ng d ch\u1ec9 v\u1ebd \u0111\u01b0\u1ee3c<span style=\"color:#16a085;\"> m\u1ed9t<\/span> \u0111\u01b0\u1eddng vuông góc k\u1ebb t\u1eeb A \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng d.<\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\">1<\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"131","test":"1","date":"2022-06-03 03:06:45","option_type":"txt","len":0},{"id":"8648","post_id":"5834","mon_id":"1158532","chapter_id":"1158662","question":"<p>Cho \u0111i\u1ec3m A n\u1eb1m ngoài \u0111\u01b0\u1eddng th\u1eb3ng d. H\u1ecfi có th\u1ec3 v\u1ebd \u0111\u01b0\u1ee3c bao nhiêu \u0111\u01b0\u1eddng xiên k\u1ebb t\u1eeb A \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng d?<\/p>","options":["1","2","3","Vô s\u1ed1"],"correct":"4","level":"2","hint":"","answer":"<p>Cho \u0111i\u1ec3m A n\u1eb1m ngoài \u0111\u01b0\u1eddng th\u1eb3ng d, có th\u1ec3 v\u1ebd \u0111\u01b0\u1ee3c <span style=\"color:#16a085;\">vô s\u1ed1<\/span> \u0111\u01b0\u1eddng xiên k\u1ebb t\u1eeb A \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng d.<\/p><p><span class=\"svgedit\"><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\" 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><g id=\"svg_9\"> <line fill=\"none\" id=\"svg_1\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"7.30625\" x2=\"265.30625\" y1=\"109.2375\" y2=\"109\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"118.30625\" x2=\"193.30625\" y1=\"16.2375\" y2=\"108.2375\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"118.30625\" x2=\"68.30625\" y1=\"16.2375\" y2=\"108.2375\"><\/line> <line fill=\"none\" id=\"svg_5\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"245.30625\" x2=\"118.30625\" y1=\"108.23751\" y2=\"15.2375\"><\/line> <ellipse cx=\"119.30625\" cy=\"17.2375\" fill=\"#ff0000\" id=\"svg_6\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-width=\"1.5\"><\/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\" text-anchor=\"start\" x=\"17.30625\" xml:space=\"preserve\" y=\"101.2375\">d<\/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\" x=\"92.30625\" xml:space=\"preserve\" y=\"23.2375\">A<\/text> <\/g> <\/g> <\/svg><\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\">Vô s\u1ed1<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-06-03 03:11:35","option_type":"txt","len":1},{"id":"8652","post_id":"5834","mon_id":"1158532","chapter_id":"1158662","question":"<p>Cho hình v\u1ebd. Ch\u1ecdn kh\u1eb3ng \u0111\u1ecbnh \u0111úng.<\/p><p><span class=\"svgedit\"><svg height=\"150\" width=\"300\"> <g><title><\/title><rect fill=\"#fff\" height=\"152\" id=\"canvas_background\" width=\"302\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_1\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"3.30625\" x2=\"271.30625\" y1=\"108.2375\" y2=\"108.2375\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"98\" x2=\"98.30625\" y1=\"13.2375\" y2=\"108.2375\"><\/line> <line fill=\"none\" id=\"svg_4\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"202.30625\" x2=\"97.30625\" y1=\"108.23751\" y2=\"13.2375\"><\/line> <rect fill=\"none\" fill-opacity=\"null\" height=\"14\" id=\"svg_5\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" width=\"14\" x=\"98.30625\" y=\"94.2375\"><\/rect> <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\" x=\"74.30625\" xml:space=\"preserve\" y=\"22.2375\">O<\/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\" text-anchor=\"start\" x=\"88.30625\" xml:space=\"preserve\" y=\"134.2375\">H<\/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\" x=\"186.30625\" xml:space=\"preserve\" y=\"131.2375\">M<\/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\" x=\"257.30625\" xml:space=\"preserve\" y=\"105.2375\">d<\/text> <line fill=\"none\" id=\"svg_10\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" x1=\"97.30625\" x2=\"56.30625\" y1=\"13.2375\" y2=\"107.2375\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"Helvetica, Arial, sans-serif\" font-size=\"24\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"43.30625\" xml:space=\"preserve\" y=\"131.2375\">N<\/text> <\/g> <\/svg><\/span><\/p>","options":["<strong>A.<\/strong> OM < OH","<strong>B.<\/strong> OM = OH","<strong>C.<\/strong> OM > OH","<strong>D.<\/strong> ON < OH"],"correct":"3","level":"2","hint":"<p>Trong các \u0111\u01b0\u1eddng xiên và \u0111\u01b0\u1eddng vuông góc k\u1ebb t\u1eeb m\u1ed9t \u0111i\u1ec3m n\u1eb1m ngoài m\u1ed9t \u0111\u01b0\u1eddng th\u1eb3ng \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng \u0111ó thì <span style=\"color:#2980b9;\">\u0111\u01b0\u1eddng vuông góc là \u0111\u01b0\u1eddng ng\u1eafn nh\u1ea5t.<\/span><\/p>","answer":"<p>T\u1eeb hình v\u1ebd ta có OH là \u0111\u01b0\u1eddng vuông góc k\u1ebb t\u1eeb O \u0111\u1ebfn d, OM và ON là các \u0111\u01b0\u1eddng xiên k\u1ebb t\u1eeb O \u0111\u1ebfn d.<\/p><p>Do \u0111ó theo \u0111\u1ecbnh lí, ta có OH ng\u1eafn nh\u1ea5t nên <span style=\"color:#2980b9;\">OH < OM và OH < ON<\/span><\/p><p><strong>A.<\/strong> OM < OH <span style=\"color:#e74c3c;\">Sai<\/span><\/p><p><strong>B.<\/strong> OM = OH <span style=\"color:#e74c3c;\">Sai<\/span><\/p><p><strong>C.<\/strong> OM > OH <font color=\"#16a085\">\u0110úng<\/font><\/p><p><strong>D.<\/strong> ON < OH <span style=\"color:#e74c3c;\">Sai<\/span><\/p><p>\u0110áp án \u0111úng là <span style=\"color:#16a085;\"><strong>C.<\/strong> OM > OH<\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"131","test":"1","date":"2022-06-03 03:36:31","option_type":"txt","len":1}]}