如图,AB是⊙O的直径,弦DB,AC的延长线相交于点P,PE垂直于AB的延长线于点E.
![](https://img.xkw.com/dksih/QBM/2017/5/2/1678396969689088/1678865852203008/STEM/bd8562689877462086d21073ef7982e6.png?resizew=179)
(1)求证:
;
(2)若
,求PE的长.
![](https://img.xkw.com/dksih/QBM/2017/5/2/1678396969689088/1678865852203008/STEM/bd8562689877462086d21073ef7982e6.png?resizew=179)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b4ad4d3216f22b456b8fa52c571bf1c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9ed83ab11606a836e256a647b28c751.png)
更新时间:2017-05-03 09:24:13
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【知识点】 几何证明选讲
相似题推荐
解答题-证明题
|
适中
(0.64)
【推荐1】已知
中,
,D是
外接圆劣弧
上的点(不与点A、C重合),延长BD至E.
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/d462bf439273491a8e47c4e972f3c0e7.png)
(1)求证:AD的延长线平分
CDE;
(2)若
,
中BC边上的高为2+
,求
外接圆的面积.
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/e13d266f9e7e4ff58631c719ba3b89b9.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/41edff2a69814130a7cd2fa035475d31.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/e13d266f9e7e4ff58631c719ba3b89b9.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/36049d33658047d09bb75ed5119af6e7.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/d462bf439273491a8e47c4e972f3c0e7.png)
(1)求证:AD的延长线平分
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/eed5985ebd0a48ae8fc37c9403df4f14.png)
(2)若
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/2167847893c641a89123141276866caa.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/e13d266f9e7e4ff58631c719ba3b89b9.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/87719cde70014bbda1fb5dfe0b7e8765.png)
![](https://img.xkw.com/dksih/QBM/2016/1/19/1572443819499520/1572443825414144/STEM/e13d266f9e7e4ff58631c719ba3b89b9.png)
您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】如图,已知半圆O的半径为2,P是直径BC延长线上的一点,PA与半圆O相切于点A, H是OC的中点,AH⊥BC.
![](https://img.xkw.com/dksih/QBM/2016/5/20/1572643402964992/1572643408871424/STEM/10f1bbc9a7da43f8b7ba1c08fd5c1781.png)
(1)求证:AC是∠PAH的平分线;
(2)求PC的长.
![](https://img.xkw.com/dksih/QBM/2016/5/20/1572643402964992/1572643408871424/STEM/10f1bbc9a7da43f8b7ba1c08fd5c1781.png)
(1)求证:AC是∠PAH的平分线;
(2)求PC的长.
您最近一年使用:0次