如图,
是圆
的直径,
是圆
上的两点,
,过点
作圆
的切线
交
的延长线于点
,连接
交
于点
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/067ddae1-2207-4de1-98a3-1089ca3635ef.png?resizew=176)
(1)求证:
;
(2)若
,试求
的长.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ea9aa3f533894ca87a394f7a1dfd0ea3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/771b610e4ddefa739a985d1e5462ce5a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00bab17635a999236e8d2e35017a208d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4cae70b8a9d2d2e96dea62c00ced04b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/6/067ddae1-2207-4de1-98a3-1089ca3635ef.png?resizew=176)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b0832663dc2ac31bb883db666b58c2da.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/64f2f7183e51aa2ec919cc0e51df5ed3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
更新时间:2019-06-24 12:45:44
|
【知识点】 几何证明选讲
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解答题-证明题
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适中
(0.65)
【推荐1】如图,已知在梯形ABCD中,AD∥BC,E是CD的中点,EF∥BC交AB于F,FG∥BD交AD于G.
求证:AG=DG.
求证:AG=DG.
![](https://img.xkw.com/dksih/QBM/2017/8/14/1758848847544320/1815766069780480/STEM/6be470ae4ab64682ab3e6b697fc53e1e.png?resizew=124)
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