如图,
是以
为直径的半圆
的三等分点,弧
的长为
,则图中阴影部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/25f9dd69-63aa-4610-a2d1-b006be151d42.png?resizew=154)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b9521effc99744da7d1445af9681a3ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1dde8112e8eb968fd042418dd632759e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/85c4bdfb0db1e31e8459df1d15f9ab55.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/79426ea1c41cbfb16de7d167bdb0860c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/23/25f9dd69-63aa-4610-a2d1-b006be151d42.png?resizew=154)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-12-25 20:00:06
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【推荐1】如图,AB是⊙O的切线,B为切点,AC经过点O,与⊙O分别相交于点D,C.若∠ACB=30°,AB=
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/27/2e24952d-de16-4800-ad4c-b0e16b8dbb56.png?resizew=184)
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【推荐2】如图,AB是圆O的直径,BC,CD,DA是圆O的弦,且BC=CD=DA,则∠BCD等于( )
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【推荐1】如图,在等腰三角形
中,
,
,以
为直径作半圆,与
,
分别相交于点
,
,则
的长度为( )
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【推荐2】如图,已知⊙P与坐标轴交于点A,O,B,点C在⊙P上,且∠ACO=60°,若点B的坐标为(0,3),则弧OA的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/5/3c420141-03b3-476d-973f-7b567afa72a0.png?resizew=170)
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【推荐1】如图,有一个半径为3的圆形时针,其中每个刻度间的弧长均相等,过9点和
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【推荐2】如图,等腰三角形
的顶角
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两点,连接
,
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【推荐1】如图,
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【推荐2】如图,∠XOY=90°,OW平分∠XOY,PA⊥OX,PB⊥OY,PC⊥OW.若OA+OB+OC=1,则OC=( )
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