(几何证明选做题)如图,从圆
外一点
引圆的切线
和割线
,已知
,
,圆心
到
的距离为
,则点
与圆
上的点的最短距离为_______ .
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/deda7e976cca4bb4a3cc5b0a97a28ced.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/37d6598bc0c94c9ba5c6306eca8527bb.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/75a829a23bdb4138ab09764f191af1e8.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/59a134e7abe34fdb8609fde25138114e.png?resizew=37)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/4b04b79d23b349b89ca27915806d1347.png?resizew=72)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/5e3cf9836bc44aa28c8a5674e67e320f.png?resizew=72)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/deda7e976cca4bb4a3cc5b0a97a28ced.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/549908119d3446078da88f8f5019b67c.png?resizew=28)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/da166e2350df4dfc842aad89a4741d93.png?resizew=24)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/37d6598bc0c94c9ba5c6306eca8527bb.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/deda7e976cca4bb4a3cc5b0a97a28ced.png?resizew=16)
![](https://img.xkw.com/dksih/QBM/2015/6/19/1572132308205568/1572132314218496/STEM/91676d0ca239477a92befa300e50438a.png?resizew=132)
更新时间:2016-12-03 14:14:17
|
【知识点】 几何证明选讲
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