如图,
是
的内切圆,
是切点,
,
.若
的周长为
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9941b969048c0478a9d4116bfe4c6c32.png)
________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9ccea461315a9d05aa0193b937d4bfe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/af872a0a0893d1a6fe61ff5d3b1fbde2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/424b90bb8080c2a18a058cf563c5ad14.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e428e7a09732be85c1224e9c8f6a71c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e78c013cb4fc61193b651072d5e15de4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9941b969048c0478a9d4116bfe4c6c32.png)
![](https://img.xkw.com/dksih/QBM/2018/12/2/2088280893693952/2089656024686592/STEM/6d6bd7a4024c4c049e67555f5ef6a9f1.png?resizew=109)
17-18九年级下·全国·单元测试 查看更多[2]
更新时间:2018-12-04 18:38:58
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【推荐1】如图所示,⊙I是Rt△ABC的内切圆,点D、E、F分别是且点,若∠ACB=90°,AB=5cm,BC=4cm,则⊙I的周长为________ cm.
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【推荐2】如图,PA,PB是
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