1 . 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
|
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2卷引用:2016届吉林省毓文中学高三高考热身考试文科数学试卷
2 . 如图所示,
内接于圆O,
是
的中点,∠
的平分线分别交
和圆
于点
,
.
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572932940955648/1572932947156992/STEM/6debfcf0aa7b4c77b9ff787cac4f2033.png)
(Ⅰ)求证:
是
外接圆的切线;
(Ⅱ)若
,
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2df6b72cbe1f6b402d5835dda1de3701.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efb49d869110f27140f5c1934143db2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.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/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/7/22/1572932940955648/1572932947156992/STEM/6debfcf0aa7b4c77b9ff787cac4f2033.png)
(Ⅰ)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/274cf35acb4a1748d15c39d15a9bea7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d73d6dde62cacc0d1fc589d3f1565304.png)
(Ⅱ)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bb5b12692517a39c320f99a479eb055.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0fe2ad465f0bd58356b12da8fa72483a.png)
您最近一年使用:0次
2016-12-04更新
|
125次组卷
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3卷引用:2016届吉林省毓文中学高三高考热身考试理科数学试卷
2014·吉林·模拟预测
3 . 【选修4-1:几何证明选讲】
如图,
为直角三角形,
,以AB为直径的圆交AC于点E,点D是BC边的中点,连接OD交圆O于点M,求证:
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571962711490560/1571962841948160/STEM/00737b15f870441ebd599c646e311425.png)
(Ⅰ)O、B、D、E四点共圆;
(Ⅱ)
.
如图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd936a2405709574af0a73543d94ad9c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a6c38d26d85081a99d51e2f686817e94.png)
![](https://img.xkw.com/dksih/QBM/2015/1/14/1571962711490560/1571962841948160/STEM/00737b15f870441ebd599c646e311425.png)
(Ⅰ)O、B、D、E四点共圆;
(Ⅱ)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7332ae405de6267bd0b704afae772f5c.png)
您最近一年使用:0次
2016-12-03更新
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4卷引用:2015届吉林省实验中学高三第四次模拟考试理科数学试卷
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