如图,已知
,含有
角的直角三角形的直角顶点在直线a上,若,则
,则
( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2bc8444d63d1ca92651c62fe9b220859.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f6b86c22b670a8e9f3896f9e8883fbbb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/80d18d538d0a860cc096309cc557cb8b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/494ba20b1444f524cf636961e4688ae8.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/9/5/71fe7fd7-7f46-4e1a-9631-69b81dbac3d2.png?resizew=149)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2023-09-05 13:42:23
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【推荐1】如图摆放着一副三角板,∠B=∠EDF=90°,点E在AC上,点D在BC的延长线上,
,∠A=30°,∠F=45°,则∠CED的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/8/730686c5-7dbd-44a3-972a-20aecfdba4f6.png?resizew=157)
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A.15° | B.20° | C.30° | D.45° |
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【推荐2】如图,将一副三角板叠放在一起,使直角的顶点重合于点 O,若∠AOC=120°,则∠BOC 等于( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/23/98f21e39-4178-4a0d-a2be-86cb48cc2f3a.png?resizew=134)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/5/23/98f21e39-4178-4a0d-a2be-86cb48cc2f3a.png?resizew=134)
A.40° | B.50° | C.30° | D.20° |
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【推荐1】如图,将长方形
沿直线
折叠到
的位置,若
,则
的度数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/3f17d928-1d8c-445d-8de2-27ad0ef9d1c6.png?resizew=160)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/22/3f17d928-1d8c-445d-8de2-27ad0ef9d1c6.png?resizew=160)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,直线AB∥CD,直线EF分别交直线AB、CD于E、F,∠BEF的平分线EG交CD于H.若∠EFH=50°,则∠BEH的度数为( )
![](https://img.xkw.com/dksih/QBM/2016/3/23/1574187253833728/1574187259658240/STEM/bac6522fb19a47c59e4e2a744ae53e93.png?resizew=160)
![](https://img.xkw.com/dksih/QBM/2016/3/23/1574187253833728/1574187259658240/STEM/bac6522fb19a47c59e4e2a744ae53e93.png?resizew=160)
A.50° | B.55° | C.60° | D.65° |
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【推荐2】如图,AB∥CD,AD与BC交于点E,若∠B=35°,∠D=45°,则∠AEC=( )
![](https://img.xkw.com/dksih/QBM/2018/1/1/1850787676217344/1856926767013888/STEM/cd93540e3cc5423eacc8e8aa57b1a7d7.png?resizew=126)
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A.35° | B.45° | C.70° | D.80° |
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