如图,PA,PB为⊙O的切线,A,B为切点,∠OAB=25°,则∠P=______ .
![](https://img.xkw.com/dksih/QBM/2021/2/24/2664996621705216/2670863008940032/STEM/f0e0f84e-d8c7-46bb-8027-e306a513c45f.png?resizew=200)
20-21九年级上·江苏南通·期末 查看更多[3]
江苏省南通市崇川区2020-2021学年九年级上学期期末数学试题(已下线)江苏省南通市如皋市2020-2021学年九年级上学期期末数学试题江苏省南京市江宁区江宁区麒麟初级中学2021-2022学年九年级上学期12月月考数学试题
更新时间:2021-03-04 22:27:36
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【推荐1】如图,
,
,
分别切
于A,B,E点.
![](https://img.xkw.com/dksih/QBM/2021/9/6/2802327240957952/2802419833987072/STEM/bc5f3175-4443-4baa-9c98-8b23ff05ebf6.png)
(1)若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
__________ ;
(2)若
,则
的周长___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bd33764ff4efddfe11a98a609753715c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d2be49c37e30a3ced0364c3e74d8c687.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://img.xkw.com/dksih/QBM/2021/9/6/2802327240957952/2802419833987072/STEM/bc5f3175-4443-4baa-9c98-8b23ff05ebf6.png)
(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4748019ffe61853bf5d1114af61c66ba.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed66570f697459aba9daa2eaf9460bcb.png)
(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a3b91aefb1a55c21c6307427a82d97cc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/177678001b2ccde1db8f57fa5e017002.png)
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【推荐2】PA、PB分别切⊙O于点A、B,若PA=3cm,那么PB=_____ cm.
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