如图,射线 AB,DC 交于点O,射线OM平分∠AOC,若∠BOD=80°,则∠COM的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/15/a58fdf98-0bca-4d3a-8cbd-9121b6d1de38.png?resizew=213)
A.30° | B.40° | C.50° | D.60° |
更新时间:2020-07-24 10:36:58
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【推荐1】下列图形是线段的是( )
A.角的平分线 | B.线段的垂直平分线 | C.圆的直径 | D.切线 |
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【推荐2】如图,点
在长方形
的内部,点
在
上且不与
、
重合,点
在
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、
重合,如果三角形
沿直线
折叠后能与三角形
重合,且
平分
,那么( )
![](https://img.xkw.com/dksih/QBM/2022/1/8/2897137045397504/2955770175676416/STEM/4fe22425-2e85-4f1f-9e98-d23f4ebb5c57.png?resizew=191)
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】下列说法中,正确的是( )
A.钝角的补角一定是锐角 | B.相等的角是对顶角 |
C.两条直线被第三条直线所截,同位角相等 | D.同旁内角相等,两直线平行 |
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【推荐2】如图,直线
相交于点O,若
,则
的度数是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/beab10ca-4ccf-4e24-92cc-e6128eae1d1e.png?resizew=184)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/24/beab10ca-4ccf-4e24-92cc-e6128eae1d1e.png?resizew=184)
A.![]() | B.![]() | C.![]() | D.![]() |
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