如图,
是圆
的直径,弦
的延长线相交于点
垂直
的延长线于点
.求证:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901712169cdb94a3c93687b0bdf3c69e.png)
![](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/7a84a5193d74f98f5dc5319bd9f92ac6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e5eeff8d9aba313f0210bf40705b79f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7dea2ae9d515f9ab351ad72306b776ee.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/901712169cdb94a3c93687b0bdf3c69e.png)
![](https://img.xkw.com/dksih/QBM/2016/11/24/1573175476822016/1573175483023360/STEM/6e084f556f8c40c986064c2e6451df8e.png?resizew=174)
更新时间:2016-12-05 01:36:37
|
【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】选修4—1:几何证明选讲
如图,直线
为圆的切线,切点为
,点
在圆上,
的角平分线
交圆于点
,
垂直
交圆于点
.
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/d1544198a48e47978a6edbff5fd353fc.png)
(1)证明:
;
(2)设圆的半径为1,
,延长
交
于点
,求
外接圆的半径.
如图,直线
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/b38a157a36134344a0d4c96670fbc9c0.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/e285c90da22c4ab7a82b81e3a87b25ed.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/000ee4adab63419695afcc109d950437.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/c2458c0c1f52417c81cc05c137412e4f.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/3101dbaf468640538d50e2be80bb9804.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/a1e72dbf08d148188ab3cc41f1f462f6.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/b97a85aa725e4d8496c27dae9751f540.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/3101dbaf468640538d50e2be80bb9804.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/888bd02ade354183a654c7788eeb4a02.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/d1544198a48e47978a6edbff5fd353fc.png)
(1)证明:
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/6085d2311a3e43188a6f99291ac31c3a.png)
(2)设圆的半径为1,
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/ca4a80364d374669a605fe3f63a0c973.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/e5a1dbeed14441428604362a6e42642f.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/b38a157a36134344a0d4c96670fbc9c0.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/fbf61d76435546e7b597a4138abce46c.png)
![](https://img.xkw.com/dksih/QBM/2015/2/12/1571989291139072/1571989297061888/STEM/74fcf6aadb0f46e799cab943c8834b1f.png)
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解答题-证明题
|
适中
(0.64)
【推荐2】如图,圆周角
的平分线与圆交于点
,过点
的切线与弦
的延长线交于点
,
交
于点
.
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573020825862144/1573020832440320/STEM/d80f73db2a234637a558c967a8345a83.png)
(1)求证:
;
(2)若
四点共圆,且
,求
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6062582a0a1679aa777451f25008411d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](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/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
![](https://img.xkw.com/dksih/QBM/2016/9/14/1573020825862144/1573020832440320/STEM/d80f73db2a234637a558c967a8345a83.png)
(1)求证:
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f90126f831d6600522ecaa66c2a8b9c.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c54583088b8451cdc5ae13b739a8eebb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4b10134e7a46e6f6f7cb9d5e2371727d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6062582a0a1679aa777451f25008411d.png)
您最近一年使用:0次