如图,四边形ABCD内接于半径为9的⊙O,∠ABC=110°,则劣弧AC的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/14/ffcfcefc-f748-4db8-977f-4cba90bb9a96.png?resizew=138)
A.7![]() | B.8![]() | C.9![]() | D.10![]() |
20-21九年级上·广东珠海·期末 查看更多[3]
更新时间:2020-01-19 06:58:51
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【推荐1】如图,四边形
是半径为2的
的内接四边形,连接
.若
,则
的长为( )
![](https://img.xkw.com/dksih/QBM/2021/9/9/2804289867153408/2804297434972160/STEM/73d12284-0b07-40d8-b9e3-0705d45a812a.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3d97cdc586744d208b6f69c9813af977.png)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】已知△ABC的外心为O,连结BO,若∠OBA=18°,则∠C的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/3a4cf0ac-ed6e-48b9-8a33-41310da4c6a5.png?resizew=136)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/3/7/3a4cf0ac-ed6e-48b9-8a33-41310da4c6a5.png?resizew=136)
A.60° | B.68° | C.70° | D.72° |
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【推荐1】如图,四边形ABCD为⊙O的内接四边形,⊙O的半径为3,AO⊥BC,垂足为点E,若∠ADC=130°,则
的长等于( )
![](https://img.xkw.com/dksih/QBM/2020/2/29/2409307302715392/2409964837036033/STEM/b502d6a8677b4df699e784b19ead77a9.png?resizew=118)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,从一块直径是1m的圆形铁皮上剪出一个圆心角为90°的扇形,将剪下的扇形围成一个圆锥,则这个圆锥的底面圆半径为( )m
![](https://img.xkw.com/dksih/QBM/editorImg/2023/11/17/65275cbe-dea4-4002-bc4c-16177ed13c16.png?resizew=76)
A.![]() | B.![]() | C.![]() | D.![]() |
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