某款“不倒翁”(图1)的示意图如图2所示,
分别与
相切于点A,B.连接
,若
的长度为
,
的半径为
,则
的度数为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/790ef3382b1c731f2885eecfd92c2a86.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f5a5e484dfef494d27bc35ae7b8cf75d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cacd50508af4235ac863c59f9dcfb6a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c9cca07a40fde9255c87310609009b13.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce710269ec0786472cad1bb73ee7d3ad.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/19768d8c55deb4973820aeab7a224e6a.png)
![](https://img.xkw.com/dksih/QBM/2023/7/17/3282714687160320/3284366275371008/STEM/7b0b2df72a44481783da56fd1e6bf897.png?resizew=162)
更新时间:2023-07-23 22:11:12
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【推荐1】切线性质定理:___________________________ .
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【推荐2】如图,
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