如图,将等腰三角形纸片沿DE折叠,使点B与点A重合,并且AC=DC,∠BAC的度数为( )
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963698156077056/3060703895969792/STEM/695466b8ad6a4a49a5fb68f91659925c.png?resizew=235)
![](https://img.xkw.com/dksih/QBM/2022/4/22/2963698156077056/3060703895969792/STEM/695466b8ad6a4a49a5fb68f91659925c.png?resizew=235)
A.120° | B.108° | C.106° | D.100° |
更新时间:2022-09-06 17:20:55
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【推荐1】在平行四边形
中,
,延长
至F,延长
至E,连接
,则
( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图所示,已知AB∥EF,CD⊥BC于点C,若∠D=92°,则下列成立的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/19/c03a1120-f128-4e6e-ad52-ed2960f7e096.png?resizew=228)
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A.∠E=20° | B.∠E=∠B | C.∠E﹣∠B=2° | D.∠E+∠B=38° |
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【推荐1】如图,在
中,
,将
沿
折叠,点
落在
边上的点
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【推荐2】已知长方形纸片ABCD,点E、F分别在边AB、CD上,连接EF,将∠BEF对折,点B落在直线EF上的点B′处,得折痕EM,将∠AEF对折,点A落在直线EF上的点A′处,得折痕EN,则图中与∠B′ME互余的角有( )
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A.2个 | B.3个 | C.4个 | D.5个 |
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【推荐1】如图,直线
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【推荐2】如图,点A、B、C、D、E在同一平面内,连接
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、
、
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( )
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【推荐1】如图,在
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【推荐2】如图,在正方形ABCD外侧作等边
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A.15° | B.22.5° | C.20° | D.10° |
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