1 . 如图,圆A与圆B交于C、D两点,圆心B在圆A上,DE为圆B的直径.已知
,则圆A的半径为______ .
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905552896/STEM/d9f3f5442f62428eb4c07e7eb675eeb1.png?resizew=99)
![](https://img.xkw.com/dksih/QBM/2015/11/18/1572294899572736/1572294905552896/STEM/bbfdd02fc28a4958994d240bcd7f68cb.png?resizew=134)
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2016-12-03更新
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206次组卷
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2卷引用:2015届湖南省长沙市雅礼中学高三5月一模理科数学试卷
2 . 如图,
,
是圆
上的两点,且
,
,
为
的中点,连接
并延长交圆
于点
,则
=_____ .
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/8ca282cd244444a89b9f5631212d4d62.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/452f7182447a4af2a71e3bb7c06efbfb.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/08f2e8d199d747b2b122b71c4ddae254.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/a787a733ae7d40a3b1d3ece4871b9fd8.png?resizew=65)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/f22c95072e424d3caf5b9f5b44d4238c.png?resizew=51)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/56c809e214f141abaf52ee6e81c9a12b.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/9e1db11b601141aeb44c2d8af2dda668.png?resizew=25)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/a028a23a7e2d413eba0e44ce48590905.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/08f2e8d199d747b2b122b71c4ddae254.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/263b03691d404cc7a2c7f82db3068731.png?resizew=17)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/3269afaef96d4b7e8fb47dd1a9bff890.png?resizew=26)
![](https://img.xkw.com/dksih/QBM/2015/4/15/1572071931600896/1572071937245184/STEM/68433afa32b44c06b697a4123a7db9b8.png?resizew=124)
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真题
3 . 过圆外一点P作圆的切线PA(A为切点),再作割线
分别交圆于B、C, 若PA=6,AC=8,BC=9,则AB=________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/764509115979e9958101808383672ec0.png)
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2016-12-03更新
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1376次组卷
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6卷引用:2015届湖南省长沙市高考模拟理科数学试卷
2015届湖南省长沙市高考模拟理科数学试卷2014年全国普通高等学校招生统一考试理科数学(重庆卷)(已下线)2014新人教A版选修4-1 2.3圆的切线性质及判定定理练习2015届湖北省武汉市武昌区高三元月调研考试理科数学试卷福建省2016届高三毕业班总复习(几何选讲)单元过关形成性测试卷(文理科)数学试题(已下线)专题17 解析几何多选、填空(理科)-1
2011·广东·一模
4 . 如图,半径为
的圆
中,
,
为
的中点,
的延长线交圆
于点
,则线段
的长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8860d9787671b53b1ab68b3d526f5ca.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20ccc37b189fa2cbc269ca0b233dac37.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/2013/1/2/1571088138420224/1571088143728640/STEM/01a56514-0ee5-4a20-8be4-1fe8ef4ed0cb.png?resizew=251)
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12-13高三上·广东肇庆·期末
5 . 如图,
为圆
的两条割线,若![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3f71ae38f3f04f112bb799c39142e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d2b1f9269e4fecd22878c4afd0425.png)
,则
的长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cc7fbe500296c20faff8c8b1c694b67d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bad3f71ae38f3f04f112bb799c39142e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3c5d2b1f9269e4fecd22878c4afd0425.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/2012/11/12/1571059827736576/1571059832946688/STEM/b25fb3c2-d686-4836-bc11-ed51ebfdd27a.png?resizew=248)
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2016-12-02更新
|
1051次组卷
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6卷引用:2015届湖南省长浏宁三一中高三5月模拟考试理科数学试卷
2015届湖南省长浏宁三一中高三5月模拟考试理科数学试卷(已下线)2012届广东省肇庆市高三上学期期末考试理科数学试题(已下线)2012届广东省肇庆市高三上学期期末考试理科数学试卷(已下线)2013届广东省广宁县广宁中学高三2月月考理科数学试卷(已下线)2014届重庆市第八中学高三第六次月考理科数学试卷2015届广东省中山一中等七校高三12月联考理科数学试卷
2011·广东深圳·一模
6 . 如图,⊙O上一点
在直径
上的射影为
,且
,
,则⊙O的半径等于____ .
![](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/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e673ef2d48215ca84a48377f17d6df00.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d71e6ea7333dbc78d0a7b9bc3892f940.png)
![](https://img.xkw.com/dksih/QBM/2011/6/3/1570234237575168/1570234242711552/STEM/4ae5e580-8990-4292-92e9-f3300bb26241.png)
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2016-11-30更新
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491次组卷
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8卷引用:2013届湖南省怀化市高三第一次模拟考试理科数学试卷
(已下线)2013届湖南省怀化市高三第一次模拟考试理科数学试卷(已下线)2011届广东省深圳高级中学高三高考最后模拟考试文数(已下线)2011届广东省深圳高级中学高三高考最后模拟考试理数(已下线)2012届广东省佛山一中高三高考模拟考试文科数学试卷2015届广东省华南师大附中高三5月三模理科数学试卷2015届广东省华南师大附中高三5月三模文科数学试卷(已下线)2014年人教A版选修四4-1第一讲1.4练习卷2015-2016学年广东省佛山一中高二10月月考数学试卷