如图,已知
中,弦
长为
,
垂直弦
于点
,
,则半径长为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1be3d84692179e396bd44483c134f6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6967ebd791092c62b4ef97924d91883.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b79dd200766db27fb90d6bd1992cf658.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2998a2e3ad7b7abae08ff75a5ee265c7.png)
![](https://img.xkw.com/dksih/QBM/2018/12/21/2101611280408576/2103918390173696/STEM/b245700316884adb812e5f098ed19e4f.png?resizew=103)
更新时间:2018-12-24 22:15:50
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