如图,
与
相切于点
,弦
.若
的半径为3,
,则
的长为_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dbf6101c529b7868bc1c2fd46aca16bc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c14c6709d2a04863cacdee618b20613e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/baa1af0ba46ced795bd98a987cc9e4c6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5edbe289ad89a4243903108709ce0381.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7e3845aa7b4dbf2293648cf32677a33e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed41d321f4c0717ac5b443aad942d9a7.png)
![](https://img.xkw.com/dksih/QBM/2019/3/18/2163010689736704/null/STEM/8e3642cbffe8428db68eea51f0711e27.png?resizew=102)
更新时间:2019-03-19 21:39:51
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【推荐1】如图,在平面直角坐标系中,点
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