如图,
的内切圆
分别与
,
,
相切于点D,E,F,且
,
,则
的周长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d0d5a2cd05e4476fc72271e8fdb59a9a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7788830ed1cb3b9c5988f70f43595f2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
A.16 | B.14 | C.12 | D.10 |
23-24九年级上·天津南开·期末 查看更多[2]
天津市南开区2023-2024学年九年级上学期期末数学试题(已下线)专题13确定圆的条件、直线和圆的位置关系 (5个知识点8种题型)-【帮课堂】2023-2024学年九年级数学下册同步学与练(北师大版)
更新时间:2024-01-03 17:30:53
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【推荐1】如图,
是
的切线,切点分别是P、C、D.若
,则
的长是( ).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eb8bef2821bca5e6ebe3ee9077a17822.png)
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A.3 | B.4 | C.5 | D.6 |
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单选题
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较易
(0.85)
【推荐2】如图所示,
是一块绿化带,
(阴影部分)是
的内切圆,将阴影部分修建成花圃,已知
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上,则小鸟正好落在花圃上的概率为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/21/35ed6905-eec1-40a2-b134-445898bb501a.jpg?resizew=170)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/dd967903ed5a6f640a5b801ec8be0070.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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