1 . 如图,锐角三角形ABC中,以BC的直径的半圆分别交AB,AC于点D,E,则⊿ADE的面积与⊿ABC的面积的比值是
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572305116585984/1572305121771520/STEM/4a6fc26879ef4d638b3a7071ac90090c.png)
![](https://img.xkw.com/dksih/QBM/2015/11/24/1572305116585984/1572305121771520/STEM/4a6fc26879ef4d638b3a7071ac90090c.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2 . 如图,已知
与圆
相切于点
,经过点
的割线
交圆
于点
、
,∠APC的平分线分别交
、
于点
、
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/020aed35-4bf3-46e7-93d0-22a4e8ee31f1.png?resizew=247)
(1)证明:∠ADE=∠AED;
(2)若AC=AP,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7b7c83470489253394bd288d7c920df.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7f9e8449aad35c5d840a3395ea86df6d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/020aed35-4bf3-46e7-93d0-22a4e8ee31f1.png?resizew=247)
(1)证明:∠ADE=∠AED;
(2)若AC=AP,求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4ce020c141e2db008dc7c8a27204a06b.png)
您最近一年使用:0次
3 . 如图,
与圆
相切于点
,直线
交圆
于
两点,弦
垂直
于
.则下面结论中,错误的结论是
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/b2df773a37f44a55819580eea066025c.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/1e6de715c71947ffb93698c644fb08fd.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/aad3fe08b4ff44f7ae29e6ae788bfe83.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/92a4e272faa64a3fbfdd5daf7da7701c.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/699d77a28d5746c28a8b90aa38ed688b.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/aad3fe08b4ff44f7ae29e6ae788bfe83.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/a776c881234744d0a931057ed759000d.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/3c5272f03da246a18f4f34b914d1b487.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/20bafe97868e4767be2734d9433e31fd.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/3053f4b15ac14e178496c968a14f9463.png)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905364480/STEM/b2df773a37f44a55819580eea066025c.png)
A.![]() | B.∠ACE=∠ACP |
C.![]() | D.![]() |
您最近一年使用:0次
2010·辽宁沈阳·一模
名校
4 . 选修4—1:几何证明选讲
如图,⊙
的直径
的延长线与弦
的延长线相交于点
,
为⊙
上一点,AE=AC ,
交
于点
,且
,
(1)求
的长度.
(2)若圆F且与圆
内切,直线PT与圆F切于点T,求线段PT的长度
如图,⊙
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/9b394cbb08bb4172b6f683d6d56d6e50.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/350a704761f9467f8c4afa5481841a93.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/667c27d748924846b3fe0a8b796f7611.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/6f5023d9d77045569aea4e23aefffb2c.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/e630d8135d4a42eeac25fce4d7c4f4aa.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/9b394cbb08bb4172b6f683d6d56d6e50.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/0d6b089decd74c2d90a9f8349e6fb084.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/350a704761f9467f8c4afa5481841a93.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/609eaf95ae7c4ec9beab6590288546c3.png)
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/cc991d1fa6f0480793c189a4a91dc30a.png)
(1)求
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4fb26d84907c923278ac4626a9d58947.png)
(2)若圆F且与圆
![](https://img.xkw.com/dksih/QBM/2010/4/17/1569698449612800/1569698454904832/STEM/9b394cbb08bb4172b6f683d6d56d6e50.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/4a3efc5b-125f-4950-9f60-1200190599ea.png?resizew=198)
您最近一年使用:0次
2016-12-03更新
|
340次组卷
|
5卷引用:2014-2015学年湖南浏阳一中高二下学期期末理科数学试卷
2014-2015学年湖南浏阳一中高二下学期期末理科数学试卷湖南省长沙市第一中学2016-2017学年高二下学期模块性检测数学(理)试题(已下线)辽宁省沈阳第十中学2010届高三高考模拟考试数学试题(理科)2015届山西省太原市五中高三5月月考理科数学试卷2015届山西省太原市五中高三5月月考文科数学试卷
5 . 如图,AB是⊙O的直径,∠E=25°,∠DBC=50°,则∠CBE=__________ .
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572117314371584/1572117320269824/STEM/e5c2275037584d8da9bebd42cd89eaf7.png?resizew=151)
您最近一年使用:0次
6 . 如图,平行四边形ABCD中,
,若
的面积等于
,则
的面积等于.
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572117314371584/1572117320204288/STEM/df1d28f6677c43ef8272e0f07031a841.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8e39c1e1d1015006418068836f1dc1a8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/425e79e4e7c13e2ea8ae3d4f8d31ac33.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc947a236aa4724f84ffef51b388a6e9.png)
![](https://img.xkw.com/dksih/QBM/2015/6/3/1572117314371584/1572117320204288/STEM/df1d28f6677c43ef8272e0f07031a841.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
7 . 如图,
是
的一条切线,切点为
和
都是
的割线,
.
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/9e9bab8eb07245379fc32b764f682bfd.png)
(1)证明:
;
(2)证明:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/fe907a13c78f4df2b148264b347f53c4.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/9486e164e97c42ba9b11d76488b2dc0d.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/70f2130fe3e44473bf8748e5f5c32c3b.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/fe907a13c78f4df2b148264b347f53c4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/625b4c2492d39e4f369cb5e724b00af1.png)
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/9e9bab8eb07245379fc32b764f682bfd.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/96b71fce156143ea8d4a1bb55c16136f.png)
(2)证明:
![](https://img.xkw.com/dksih/QBM/2016/8/4/1572959041642496/1572959047884800/STEM/0c69a9250af54dcb8e09d6ae3a52a9b7.png)
您最近一年使用:0次
2014高三·全国·专题练习
名校
8 . 已知直线2x-my+1-3m=0,当m变动时,所有直线都通过定点
A.(-![]() | B.(![]() | C.(![]() | D.(-![]() |
您最近一年使用:0次
2016-12-03更新
|
2740次组卷
|
9卷引用:山西省大同市第一中学2017-2018学年高二上学期期中考试数学试题1
山西省大同市第一中学2017-2018学年高二上学期期中考试数学试题1山西省大同市第一中学2017-2018学年高二上学期期中考试数学试题2(已下线)章末检测3(课后作业)-2018-2019版数学创新设计课堂讲义同步系列(人教A版必修2)安徽省合肥市肥东县高级中学2020-2021学年高二上学期第二次月考数学(理)试题江西省南昌县莲塘第三中学2020-2021学年高二上学期期中考试数学试题山西省长治市第二中学2021-2022学年高二上学期第一次月考数学试题(已下线)2015高考数学(理)一轮配套特训:8-1直线的倾斜角与斜率、直线方程智能测评与辅导[文]-直线与圆四川省南充高中2019-2020学年高一下学期第一次月考试题数学(文科)试题
12-13高三·河南南阳·阶段练习
9 . 如图,在
中,
是
的角平分线,
的外接圆交
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572696996036608/1572697002213376/STEM/a1d2f57cf6d74c838b101b1424485b37.png)
(1)证明:
;
(2)当
,
时,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0c71855e55064d1dc59eabe43e73a881.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/846071242f981289741ad19f4e7190cf.png)
![](https://img.xkw.com/dksih/QBM/2016/6/7/1572696996036608/1572697002213376/STEM/a1d2f57cf6d74c838b101b1424485b37.png)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/679372e54c59c5cf67931b12b9833e02.png)
(2)当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca036d049f5205cf04cb1b9c5cd03f97.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/72f7d9f5e71bfef8188b1216c1276c2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
您最近一年使用:0次
2016-12-02更新
|
728次组卷
|
7卷引用:2015-2016学年重庆八中高二下阶段性检测五文科数学试卷
2012·河南焦作·一模
10 . 在
中,AB=AC,过点A的直线与其外接圆交于点P,交BC延长线于点D.
![](https://img.xkw.com/dksih/QBM/2012/7/12/1570923707105280/1570923712651264/STEM/13cf603650fe4de19d4d0d65cea4b9fc.png)
(1)求证:
;
(2)若AC=3,求
的值.
![](https://img.xkw.com/dksih/QBM/2012/7/12/1570923707105280/1570923712651264/STEM/4068bd6d669d4586b69702cb3762e8c2.png)
![](https://img.xkw.com/dksih/QBM/2012/7/12/1570923707105280/1570923712651264/STEM/13cf603650fe4de19d4d0d65cea4b9fc.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2012/7/12/1570923707105280/1570923712651264/STEM/0a245338e40a4c728e67305b45866c4f.png)
(2)若AC=3,求
![](https://img.xkw.com/dksih/QBM/2012/7/12/1570923707105280/1570923712651264/STEM/3d841a1467fa49a59809ed6a011bc517.png)
您最近一年使用:0次
2016-12-02更新
|
349次组卷
|
9卷引用:2014-2015学年河南省确山县二中高二4月月考文科数学试卷
2014-2015学年河南省确山县二中高二4月月考文科数学试卷(已下线)2012届河南省焦作市高三第一次质量检测理科数学试卷(已下线)2012届河南省焦作市高三第一次质量检测文科数学试卷(已下线)2012届黑龙江省哈六中高三第三次模拟考试理科数学试卷(已下线)2012届河北省唐山一中高三第一次高考仿真测试理科数学试卷(已下线)2013届甘肃省河西五市部分普通高中高三第二次(5月)联考理科数学试卷(已下线)2014届云南部分名校(玉溪一中)高三11月月考理科数学试卷2015届宁夏固原市第一中学高三最后冲刺模拟文科数学试卷2016届湖南省长沙市一中高三月考八理科数学试卷