如图,已知直线
切圆
于点
,割线
交圆
于点
两点,
的角平分线分别与
交于
两点
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572570593738752/1572570599424000/STEM/bdf635618a0c48bab9079d68eaf1d72f.png?resizew=271)
(1)证明:
;
(2)若
,求
的值.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66a5b7813e902306477f91f9f4084cd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c545fe275a2c798c5afd3a3642ee6b31.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8bc380e172eb78d4544feedaa016b927.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/97f733780d9e20404a6a1776182d40b1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5881068127a39caf319492b4177204f0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a4bc45ba4c2ad98835bfdd40c2212ba9.png)
![](https://img.xkw.com/dksih/QBM/2016/4/7/1572570593738752/1572570599424000/STEM/bdf635618a0c48bab9079d68eaf1d72f.png?resizew=271)
(1)证明:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e30e50e094cd2849e38859b36aad0b0c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7d206dc4058770c3464bd3552f8de311.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/89b7184d20010bb8e3dd8210c8ce3ccb.png)
更新时间:2016-12-04 05:05:59
|
【知识点】 几何证明选讲
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解答题-证明题
|
适中
(0.64)
【推荐1】如图所示,
内接于圆,
切圆于
是
延长线上一点,连接
交
于
点.若
是
的中点.求证:
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0faed94a64b2dcfc6801b4fca0f16675.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16d3f0454a0d7985a9e88d85f13ab9cb.png)
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您最近一年使用:0次
解答题-证明题
|
适中
(0.64)
【推荐2】(选修4-1:几何证明选讲)如图,AB是圆O的直径,D为圆O上一点,过D作圆O的切线交AB的延长线于点C.若AB =" 2" BC ,
求证:
.
求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1393308bc68322f50fa29702dd412263.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/2/469c5b94-1ab1-40e7-a3ba-ca05c377b671.png?resizew=171)
您最近一年使用:0次