选修4-1:几何证明选讲
如下图,
的半径
垂直于直径
,
为
上一点,
的延长线交
于点
,过点
的
切线交
的延长线于点
.
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134550474752/1573134557028352/STEM/a98052ec168847abbf73b2f06d1dafa3.png)
(I)求证:
;
(II)若
的半径为
,
,求
的长.
如下图,
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b90e0f35eda1a729fed485f83da5ea9d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2c3d2cba96f6f03520c0b3f6e4da03e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e69d2b798744645af88a4fa411344a83.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/54a5d7d3b6b63fe5c24c3907b7a8eaa3.png)
切线交
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9abaeba15f3abdd877bc701af52c5cd9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dad2a36927223bd70f426ba06aea4b45.png)
![](https://img.xkw.com/dksih/QBM/2016/11/9/1573134550474752/1573134557028352/STEM/a98052ec168847abbf73b2f06d1dafa3.png)
(I)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/11e803296c894cc4e3f38628c6666520.png)
(II)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/38387ba1cadfd3dfc4dea4ca9f613cea.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3314c1c98458fc91d1dd892b7ea452b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
更新时间:2016-12-05 00:13:21
|
【知识点】 几何证明选讲
相似题推荐
解答题-问答题
|
适中
(0.64)
【推荐1】如图,已知
是
的直径,
是
的切线,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572647305265152/1572647311695872/STEM/921145f648c04f019533f3949cca898c.png)
(1)若
为
的中点,证明:
是
的切线;
(2)若
,求
的大小.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/2016/5/25/1572647305265152/1572647311695872/STEM/921145f648c04f019533f3949cca898c.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/880be04496b4e06b1c47d433d880b442.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/db966856ec2cbe925bdf8ee29fc93611.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0427054c47e348f35771872fd0215a8a.png)
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
的直径,弦BD、CA的延长线相交于点E,F为BA延长线上一点,且
,求证:
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572124333285376/1572124339879936/STEM/6aaa1a8144514f609e6c46244bcb98ca.png)
(1)
;
(2)
.
如图,AB是
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572124333285376/1572124339879936/STEM/0b35f0ca5c7f42499290426caf20727c.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572124333285376/1572124339879936/STEM/043e8b161a544968bf12a2e3696c9d54.png)
![](https://img.xkw.com/dksih/QBM/2015/6/15/1572124333285376/1572124339879936/STEM/6aaa1a8144514f609e6c46244bcb98ca.png)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a43f790457e28ec7a918e4352eaf81df.png)
(2)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/990be575bbb0ac644bbb04f23c19ce21.png)
您最近一年使用:0次