Vị trí tương đối của đường thẳng và đường tròn

Home Lớp 9 Toán lớp 9 - Sách Kết nối tri thức Bài 16. Vị trí tương đối của đường thẳng và đường trònBài tập trung bình

{"common":{"save":0,"post_id":"7937","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8548","post_id":"7937","mon_id":"1159278","chapter_id":"1159329","question":"Cho tam giác nh\u1ecdn ABC có \u0111\u01b0\u1eddng cao AH. Kh\u1eb3ng \u0111\u1ecbnh nào \u0111úng?<\/p>(1) \u0110\u01b0\u1eddng th\u1eb3ng AB ti\u1ebfp xúc v\u1edbi \u0111\u01b0\u1eddng tròn (A; AH).<\/p>(2) \u0110\u01b0\u1eddng th\u1eb3ng AC ti\u1ebfp xúc v\u1edbi \u0111\u01b0\u1eddng tròn (A; AH).<\/p>(3) \u0110\u01b0\u1eddng th\u1eb3ng BC ti\u1ebfp xúc v\u1edbi \u0111\u01b0\u1eddng tròn (A; AH).<\/p>","options":["A.<\/strong> Kh\u1eb3ng \u0111\u1ecbnh (1).","B.<\/strong> Kh\u1eb3ng \u0111\u1ecbnh (2).","C.<\/strong> Kh\u1eb3ng \u0111\u1ecbnh (3).","D.<\/strong> C\u1ea3 3 kh\u1eb3ng \u0111\u1ecbnh trên \u0111\u1ec1u \u0111úng."],"correct":"3","level":"2","hint":"","answer":"Ch\u1ecdn C.<\/strong> Kh\u1eb3ng \u0111\u1ecbnh (3).<\/span><\/p>Vì AH &perp; BC và H thu\u1ed9c \u0111\u01b0\u1eddng th\u1eb3ng BC nên kho\u1ea3ng cách t\u1eeb \u0111i\u1ec3m A \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng BC b\u1eb1ng AH. Do \u0111ó, kho\u1ea3ng cách t\u1eeb tâm A c\u1ee7a \u0111\u01b0\u1eddng tròn (A; AH) \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng BC b\u1eb1ng bán kính AH c\u1ee7a \u0111\u01b0\u1eddng tròn. <\/p>V\u1eady \u0111\u01b0\u1eddng th\u1eb3ng BC ti\u1ebfp xúc v\u1edbi \u0111\u01b0\u1eddng tròn (A; AH).<\/p><svg height=\"240\" width=\"250\"> <g><title><\/title><rect fill=\"#fff\" height=\"242\" id=\"canvas_background\" width=\"252\" 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_12\"> <path d=\"m109.20665,108.31777l132.39336,108l-185,-1.6875z\" fill=\"#ffff56\" id=\"svg_1\" stroke=\"#000\" stroke-width=\"1.5\"><\/path> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"108.99999\" x2=\"109\" y1=\"108.43181\" y2=\"214.43181\"><\/line> <rect fill=\"#aaffff\" height=\"12\" id=\"svg_3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" width=\"12\" x=\"108.99999\" y=\"202.43181\"><\/rect> <ellipse cx=\"109.49999\" cy=\"108.43181\" fill=\"none\" id=\"svg_4\" rx=\"106\" ry=\"106\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <ellipse cx=\"108.99999\" cy=\"108.93181\" fill=\"#ff0000\" id=\"svg_7\" rx=\"3\" ry=\"3\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" id=\"svg_8\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"101.99999\" xml:space=\"preserve\" y=\"237.43181\">H<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" id=\"svg_9\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"100.99999\" xml:space=\"preserve\" y=\"96.43181\">A<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"41.99999\" xml:space=\"preserve\" y=\"234.43181\">B<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"232.99999\" xml:space=\"preserve\" y=\"236.43181\">C<\/text> <\/g> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-14 09:41:05","option_type":"txt","len":2},{"id":"8550","post_id":"7937","mon_id":"1159278","chapter_id":"1159329","question":"Cho hình vuông ABCD, trên \u0111\u01b0\u1eddng chéo BD l\u1ea5y \u0111i\u1ec3m I sao cho BI = BA. \u0110\u01b0\u1eddng th\u1eb3ng k\u1ebb qua I vuông góc v\u1edbi BD c\u1eaft AD \u1edf E. Ch\u1ecdn \u0111áp án \u0111úng<\/strong>:<\/p>","options":["A.<\/strong> \u0110\u01b0\u1eddng th\u1eb3ng BD ti\u1ebfp xúc v\u1edbi (I; EA).","B.<\/strong> \u0110\u01b0\u1eddng th\u1eb3ng BD ti\u1ebfp xúc v\u1edbi (E; EA).","C.<\/strong> \u0110\u01b0\u1eddng th\u1eb3ng AD ti\u1ebfp xúc (I; EA).","D.<\/strong> \u0110\u01b0\u1eddng th\u1eb3ng AD không c\u1eaft (E; EA)."],"correct":"2","level":"2","hint":"","answer":"Ch\u1ecdn B.<\/strong> \u0110\u01b0\u1eddng th\u1eb3ng BD ti\u1ebfp xúc v\u1edbi (E; EA).<\/span><\/p>Xét ΔAEB (vuông t\u1ea1i A) và ΔIEB (vuông t\u1ea1i I) có: AB = BI (gt), BE chung.<\/p>Suy ra ΔAEB = ΔIEB (ch–cgv) suy ra AE = EI hay I ∈ (E; EA).<\/p>M\u1eb7t khác: EI &perp; BD hay kho\u1ea3ng cách t\u1eeb \u0111i\u1ec3m E \u0111\u1ebfn \u0111\u01b0\u1eddng th\u1eb3ng BD b\u1eb1ng EI mà EI = EA (cmt) nên \u0111\u01b0\u1eddng th\u1eb3ng BD ti\u1ebfp xúc v\u1edbi (E; EA).<\/p><svg height=\"282\" width=\"302\" xmlns:xlink=\"http:\/\/www.w3.org\/1999\/xlink\"> 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y2=\"125.99999\"><\/line> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-14 09:48:18","option_type":"txt","len":2},{"id":"8551","post_id":"7937","mon_id":"1159278","chapter_id":"1159329","question":"T\u1eeb \u0111i\u1ec3m A n\u1eb1m bên ngoài \u0111\u01b0\u1eddng tròn (O; 8 cm) sao cho OA = 12 cm. K\u1ebb tia Ax t\u1ea1o v\u1edbi OA m\u1ed9t góc 30°. G\u1ecdi H là hình chi\u1ebfu c\u1ee7a O trên tia Ax. Tia Ax và \u0111\u01b0\u1eddng tròn (O) có bao nhiêu \u0111i\u1ec3m chung?<\/p>","options":["A.<\/strong> 0","B.<\/strong> 2","C.<\/strong> 1","D.<\/strong> Vô s\u1ed1"],"correct":"2","level":"2","hint":"","answer":"Ch\u1ecdn B.<\/strong> 2<\/span><\/p>T\u1eeb ΔAOH vuông t\u1ea1i H, ta có: OH = OA . sinA = 12 . sin30° = 6 (cm).<\/p>Suy ra OH < R (6 cm < 8 cm)<\/p>V\u1eady tia Ax và \u0111\u01b0\u1eddng tròn (O; 8 cm) c\u1eaft nhau t\u1ea1i hai \u0111i\u1ec3m.<\/p><svg height=\"210\" width=\"250\"> <g><title><\/title><rect fill=\"#fff\" height=\"212\" id=\"canvas_background\" width=\"252\" x=\"-1\" y=\"-1\"><\/rect> <g display=\"none\" id=\"canvasGrid\"> <rect fill=\"url(#gridpattern)\" height=\"100%\" id=\"svg_4\" stroke-width=\"0\" width=\"100%\" x=\"0\" y=\"0\"><\/rect> <\/g> <\/g> <g><title><\/title><g id=\"svg_19\"> <ellipse cx=\"156.99999\" cy=\"124.02272\" fill=\"#d4ffaa\" id=\"svg_1\" rx=\"80\" ry=\"80\" stroke=\"#000\" stroke-width=\"1.5\"><\/ellipse> <line fill=\"none\" id=\"svg_2\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"25\" x2=\"160\" y1=\"125\" y2=\"124.52272\"><\/line> <line fill=\"none\" id=\"svg_3\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(60 126.00000000000001,66.52272033691405) \" x1=\"125.99999\" x2=\"126\" y1=\"-49.47728\" y2=\"182.52272\"><\/line> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" id=\"svg_6\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"2.99999\" xml:space=\"preserve\" y=\"126.52272\">A<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" id=\"svg_7\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"154.99999\" xml:space=\"preserve\" y=\"151.52272\">O<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"24\" font-style=\"italic\" id=\"svg_8\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"219.99999\" xml:space=\"preserve\" y=\"24.52272\">x<\/text> <line fill=\"none\" id=\"svg_9\" stroke=\"#000\" stroke-linecap=\"undefined\" stroke-linejoin=\"undefined\" stroke-width=\"1.5\" transform=\"rotate(-30 141.3169860839843,96.98683929443355) \" x1=\"141.31698\" x2=\"141.31698\" y1=\"62.97368\" y2=\"131\"><\/line> <rect fill=\"#ffffaa\" height=\"10\" id=\"svg_10\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\" transform=\"rotate(60 131.99998474121097,69.52272033691405) \" width=\"10\" x=\"126.99999\" y=\"64.52272\"><\/rect> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"15\" id=\"svg_11\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"54.99999\" xml:space=\"preserve\" y=\"122.52272\">30<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"15\" id=\"svg_12\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"68.99999\" xml:space=\"preserve\" y=\"114.52272\">o<\/text> <line fill=\"none\" id=\"svg_13\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"157.99999\" x2=\"162.99999\" y1=\"123.52272\" y2=\"44.52272\"><\/line> <ellipse cx=\"157.49999\" cy=\"124.52272\" fill=\"#ff0000\" id=\"svg_5\" rx=\"4.5\" ry=\"4\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"1.5\"><\/ellipse> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" id=\"svg_14\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"163.99999\" xml:space=\"preserve\" y=\"96.52272\">8<\/text> <text fill=\"#000000\" fill-opacity=\"null\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" id=\"svg_15\" stroke=\"#000\" stroke-opacity=\"null\" stroke-width=\"0\" text-anchor=\"start\" x=\"79.99999\" xml:space=\"preserve\" y=\"145.52272\">12<\/text> <text fill=\"#000000\" font-family=\"’Times New Roman’, Times, serif\" font-size=\"20\" font-style=\"normal\" id=\"svg_16\" stroke=\"#000\" stroke-width=\"0\" text-anchor=\"start\" x=\"114.99999\" xml:space=\"preserve\" y=\"92.52272\">H<\/text> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_17\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"104.99999\" x2=\"104.99999\" y1=\"73.52272\" y2=\"82.52272\"><\/line> <line fill=\"none\" fill-opacity=\"null\" id=\"svg_18\" stroke=\"#000\" stroke-linecap=\"null\" stroke-linejoin=\"null\" stroke-opacity=\"null\" stroke-width=\"1.5\" x1=\"142.99999\" x2=\"143.99999\" y1=\"48.52272\" y2=\"60.52272\"><\/line> <\/g> <\/g> <\/svg><\/span><\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-11-14 09:53:39","option_type":"txt","len":0}]}