1 . 选修4-1:几何证明选讲
如图所示,
是
的直径,
为
延长线上的一点,
是
的割线,过点
作
的垂线,交
的延长线于点
,交
的延长线于点
.求证:
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/4c15bed67df84698a169278388ea534c.png)
(Ⅰ)
;
(Ⅱ)若
,求
.
如图所示,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/dc9ccddb0f05497ba403e5cf0277e4e1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/91f3956f008cc29ca4bae44a087d5427.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/2e3d32c677944aef95a888bcdcb878a8.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/4c15bed67df84698a169278388ea534c.png)
(Ⅰ)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/c684d9a9f8cc49998be3f20c3200a07c.png)
(Ⅱ)若
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/6f8ad711bf434f62917a29158d18e4a3.png)
![](https://img.xkw.com/dksih/QBM/2016/8/17/1572979903684608/1572979910057984/STEM/c1dbe7a441d2425f87dfec3c24df722b.png)
您最近一年使用:0次
2016-12-04更新
|
118次组卷
|
2卷引用:2016届陕西省黄陵中学高三下第六次模拟理科数学试卷
2 . 如图所示,以直角三角形
的斜边
为直径作外接圆
,
为圆
上任一点,连接
,过点
作
边上的高
,过点
作圆
的切线与
的延长线交于点
.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572927076605952/1572927083085824/STEM/8b4739e826694db68b867b3d21f14257.png)
(1)求证:
;
(2)若
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e17966797ec9e37f56c1193af65ebf7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/68a83fdd2ba72a2dba0b6b10bb3e06b9.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/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572927076605952/1572927083085824/STEM/8b4739e826694db68b867b3d21f14257.png)
(1)求证:
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572927076605952/1572927083085824/STEM/d68e153506ee44c4b95591843d14d7c3.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1d4e1ec75d4b7bca856b2333167a5203.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
您最近一年使用:0次
2011·广东·一模
3 . 如图,已知△ABC内接于圆O,点D在OC的延长线上,AD是⊙0的切线,若∠B=30°,AC=2,则OD的长为____________ .
![](https://img.xkw.com/dksih/QBM/2011/3/17/1570046306656256/1570046311874560/STEM/098a7672859c450b853c42734162705f.png?resizew=105)
您最近一年使用:0次
2011·广东深圳·一模
4 . 已知圆面
的面积为
,平面区域
与圆面
的公共区域的面积大于
,则实数
的取值范围是
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1ab12dc10145236042e5cc895064cc40.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf231f8f86fb922df4ca0c87f044cec3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bce0a5282d7bd2c6e54f6113c84438ea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8b9cf868dc77759a01d2f550d6ab291.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0a6936d370d6a238a608ca56f87198de.png)
A.![]() | B.![]() | C.![]() | D.![]() |
您最近一年使用:0次
2011·辽宁·模拟预测
5 . 选修4-1:几何证明选讲
如图,△ABC是内接于⊙O,AB=AC,直线MN切⊙O于点C,弦BD∥MN,AC与BD相交于点E.
(1)求证:△ABE≌△ACD;
(2)若AB=6,BC=4,求AE.
如图,△ABC是内接于⊙O,AB=AC,直线MN切⊙O于点C,弦BD∥MN,AC与BD相交于点E.
(1)求证:△ABE≌△ACD;
(2)若AB=6,BC=4,求AE.
![](https://img.xkw.com/dksih/QBM/2011/3/29/1570084766720000/1570084771979264/STEM/d5ba05808d304124a0aad8f96d83b4ca.png?resizew=176)
您最近一年使用:0次
6 . 如图,已知
是⊙
的直径,
是⊙
的弦,
的平分线
交⊙
于
,过点
作
交
的延长线于点
,
交
于点
.若
,求
的值.
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/39dad1e4dd9846d1be8ed2177299a9ea.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/17389ff5a5d34160b0b0068b05e94617.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/f2c9c2cce12648fa880e9320f440d811.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/17389ff5a5d34160b0b0068b05e94617.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/7d5a06b88c8c4788a81c68259bf8a910.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/c045b962a154486cbb3f532acf127d72.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/17389ff5a5d34160b0b0068b05e94617.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/ef95d059031742d1bd67605da6855272.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/ef95d059031742d1bd67605da6855272.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/980927db1f3642d6a14de29f47fff9cf.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/f2c9c2cce12648fa880e9320f440d811.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/7b28e62db1ab4e6fa0b47744f4a9f1b5.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/3d98dfecdb074cf4832294d82a3dac1a.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/c045b962a154486cbb3f532acf127d72.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/d0ce3831c0fe48a9a4b79396e57cc472.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/5b0ba7a4706b41e6b668427e1c58717c.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/34fc15765e3e4abdb219c8b277616af6.png)
![](https://img.xkw.com/dksih/QBM/2016/6/1/1572683725635584/1572683731976192/STEM/b9a062a92050442dbbc88eb075257991.png)
您最近一年使用:0次
2016-12-04更新
|
405次组卷
|
2卷引用:2016届海南省海南中学高考模拟九理科数学试卷
7 . 选修4-1:几何证明选讲
如图,圆周角
的平分线与圆交于点
,过点
的切线与弦
的延长线交于点
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273014292480/1572273020624896/STEM/250ee19ea09e4222bacc8433628290df.png)
(1)求证:
;
(2)若
,
,
,
四点共圆,且
,求
.
如图,圆周角
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e57541260bfadf7624c86769eec0fc1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9febb0e53890d2fb72fdfd7f0aa88acc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b693717f525facc79b9a500ed998b109.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/588a2119bc5e8cdf4731828b195a7892.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://img.xkw.com/dksih/QBM/2015/10/28/1572273014292480/1572273020624896/STEM/250ee19ea09e4222bacc8433628290df.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa9132693acc1c5c9f9b50445cf98e2.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1f0b669ef4514f24ee09adeff7f41238.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/33ebbd866e455cf80ea669c9f56f792c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2391c0e2fc44598610d519dacb778062.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/14da8b9947feb556eb2669fcb6ba6277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6e57541260bfadf7624c86769eec0fc1.png)
您最近一年使用:0次
2016-12-04更新
|
90次组卷
|
3卷引用:2016届吉林省实验中学高三上学期第一次模拟理科数学试卷1
8 . (几何证明选讲选做题)如图,
是半圆的圆心,直径
,
是圆的一条切线,割线
与半圆交于点
,
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80bf0ef21361fd56b8ae12baee60646.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/654e4b97e4eeb2747eb0125c22e50f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8cb20ebe31907333155b5da24d6a29b4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/467d98d40ea4c89327a286ca17bdafc9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5ea9afccd2b31c2208bc6baf5ddca5d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ca66a268d6f46e0e9d5d9151b785be60.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b8eeb511aba17a0dabdb8bf0ae4c7b74.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d80bf0ef21361fd56b8ae12baee60646.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/904b200c-2695-46e2-93e0-b984b09e109f.png?resizew=119)
您最近一年使用:0次
9 . 选修4-1:几何证明选讲
圆
是以
为直径的圆,延长
与
交于
点.
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/0af4c3ca-0cdd-4590-b9fa-8c30228df30a.png?resizew=183)
(Ⅰ)求证:
是圆
的切线;
(Ⅱ)
,求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf5762def25feb1ab47465e2d629a8cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/13/0af4c3ca-0cdd-4590-b9fa-8c30228df30a.png?resizew=183)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
(Ⅱ)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572913900216320/1572913906786304/STEM/5587f10125244c48927f92d3b4c46728.png)
![](https://img.xkw.com/dksih/QBM/2016/7/12/1572913900216320/1572913906786304/STEM/56db4f8204bd4e78afc69c77d0c6d2f3.png)
您最近一年使用:0次
2016-12-04更新
|
115次组卷
|
2卷引用:2016届黑龙江哈尔滨六中高三下四模考试文科数学试卷