如图,将一副直角三角板叠在一起,使直角顶点重合于点O,若∠AOB=155°,则∠COD=( ).
![](https://img.xkw.com/dksih/QBM/2019/2/12/2139080667152384/2139247270207489/STEM/a5a74683072b4069ad34c59883fd4db7.png?resizew=179)
![](https://img.xkw.com/dksih/QBM/2019/2/12/2139080667152384/2139247270207489/STEM/a5a74683072b4069ad34c59883fd4db7.png?resizew=179)
A.155° | B.65° | C.45° | D.25° |
更新时间:2019-02-12 20:12:37
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【知识点】 角的运算
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【推荐1】只用一副三角板可以画出的角度是( )
A.115° | B.160° | C.75° | D.80° |
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单选题
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【推荐2】将一块等腰直角三角板
按如图方式摆放(
),其中直线
,点C落在直线
上,若
,则
的度数是( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7bef5239ddbb0972700ce01daf9ee7cf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c42ed2e5bd5a0f033e24008697bf4963.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d57899ad4774aed9ccc7bd23db72153.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/8/3/d996ecac-b525-4de4-87a2-878715b823e9.png?resizew=176)
A.![]() | B.![]() | C.![]() | D.![]() |
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