菱形的周长为12,一个内角为60°,则较短的对角线长为( )
A.2 | B.3 | C.1 | D.![]() |
更新时间:2022-08-16 16:39:06
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【推荐1】如图,
内接于
,
为
的直径,直线
与
相切于点C,过点O作
,交
于点E.若
,则
的度数为( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,在Rt△ABC中,∠ABC=90°,AC=4,AB=2,以点B为圆心,AB为半径画弧,交AC于点D,交BC于点E,连接BD,则图中阴影部分面积为( )
![](https://img.xkw.com/dksih/QBM/2018/11/16/2076838892789760/2077661987307521/STEM/59f0572c58d6471b9986f09282988084.png?resizew=166)
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【推荐1】将
个形状、大小均相同的菱形按照如图所示的方式排成一列,使得右侧菱形的顶点与左侧菱形的对角线交点重合,若这些菱形的边长均为
,则阴影部分的周长总和等于( )
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/701554763bdbbf2689a8dae07608da38.png)
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【推荐2】如图在菱形
中,对角线
相交于点O,E为
的中点,且
,则菱形
的周长是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/22/be705ed6-77c5-43d7-a1e3-847da0e14304.png?resizew=210)
A.20 | B.40 | C.60 | D.80 |
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