1 . 如图,AB为⊙O的直径,BD是⊙O的切线,连接AD交⊙O于E,若BD∥CE,AB交CE于M,求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e4b0311cb57d78f465a57dc7f26353c.png)
![](https://img.xkw.com/dksih/QBM/2018/12/5/2090404214185984/2094345211813888/STEM/647c1bdc-8188-4995-bad2-424c20db0e6d.png)
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2010高三·全国·专题练习
真题
2 . 如图,△ABC的角平分线AD的延长线交它的外接圆于点![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e28ce60503fab70ce1797449d90dadc.png)
(Ⅰ)证明:△ABE∽△ADC;
(Ⅱ)若△ABC的面积
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e28ce60503fab70ce1797449d90dadc.png)
(Ⅰ)证明:△ABE∽△ADC;
(Ⅱ)若△ABC的面积
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ec4fccf16c3064c1fe33098ec3e8ae2b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7cbce11aa19b8bd2bf6ee5a834e005de.png)
![](https://img.xkw.com/dksih/QBM/2011/2/25/1570012428500992/1570012433973248/STEM/a38682262ddd43fea44e49fb2f7163c1.png?resizew=152)
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2016-11-30更新
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403次组卷
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9卷引用:2010年普通高等学校招生全国统一考试(辽宁卷)文科数学全解全析
2010年普通高等学校招生全国统一考试(辽宁卷)文科数学全解全析(已下线)2010年高考试题分项版文科数学之专题十七 选修系列(已下线)2011届宁夏贺兰一中高三上学期期末考试数学理卷(已下线)2011-2012学年河南省周口市高二下学期四校第一次联考文科数学试卷(已下线)2013-2014学年河北省石家庄市高二下学期期末考试理科数学试卷2015届甘肃省河西三校普通高中高三上学期第一次联考理科数学试卷2015届甘肃省河西三校普通高中高三上学期第一次联考文科数学试卷2017届广东珠海市高三9月摸底考试数学(理)试卷河南省郑州市巩义中学2019-2020学年高二下学期期中考试数学(文)试题
12-13高三上·辽宁本溪·期末
3 . 如图,D,E分别是AB,AC边上的点,且不与顶点重合,已知
,
为方程
的两根,
(1) 证明
四点共圆;
(2) 若
,求
四点所在圆的半径.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b662797f6678e2475f4631563694e37a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cea77ba313fcc751481ac1ca214df3fc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6ed516191ef7d1805cd7cf945232d79.png)
(1) 证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b226772d996dafd09c37b5bad17d54fd.png)
(2) 若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/96f402d5cb7a7d2ea738391f39a00897.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b226772d996dafd09c37b5bad17d54fd.png)
![](https://img.xkw.com/dksih/QBM/2012/2/15/1570738702614528/1570738707406848/STEM/bd53a0f954f849d9b5e078e4efc9698f.png?resizew=150)
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11-12高三上·北京西城·期末
4 . 如图所示,过圆
外一点
作一条直线与圆
交于
两点,
,
与圆
相切于
点.已知圆
的半径为
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0236c4f451f4c9ed191aaab341215e25.png)
_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d819bc7bb35931f3b141464a9daccf1a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f1bacbd6384c2c33610fef45532e632.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d583183429b6b31aa9742eefc67d3181.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f97827d23a27efaf3d639f3abe430c9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0236c4f451f4c9ed191aaab341215e25.png)
![](https://img.xkw.com/dksih/QBM/2011/2/10/1569980453969920/1569980458901504/STEM/f9baf4268a88424783b451e40c8ee248.png?resizew=97)
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