如图,在正方OABC中,点B的坐标是(4,4),点E、F分别在边BC、BA上,
.若
,则点F的纵坐标是( )
![](https://img.xkw.com/dksih/QBM/2019/8/14/2268501046919168/2273731575332864/STEM/d5e0a1cbd8824331b735c6ef17516142.png?resizew=121)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f94c3e57ce6ed8c71cbbdfdc518d9c09.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcf3dc0fbcda4c58379f08ee0b5cd8a7.png)
![](https://img.xkw.com/dksih/QBM/2019/8/14/2268501046919168/2273731575332864/STEM/d5e0a1cbd8824331b735c6ef17516142.png?resizew=121)
A.1 | B.![]() | C.2 | D.![]() |
更新时间:2019-08-21 20:21:38
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【推荐1】如图,在△AFD和△CEB中,点A,E,F,C在同一条直线上,有下列四个论断:①AD=CB;②AD∥BC;③AE=CF;④∠D=∠B.用其中的三个作为条件,不能得到△ADF≌△CBE的三个条件的序号是( )
![](https://img.xkw.com/dksih/QBM/2018/7/2/1979679226028032/1981295404449793/STEM/fdffd9905a68432c88d2022beabefcd3.png?resizew=97)
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A.①②③ | B.①②④ | C.②③④ | D.①③④ |
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【推荐2】如图,在四边形ABCD中,F是对角线AC的中点,连接DF并延长交BC于点E,若
,
,
,则四边形
的面积为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c503e29373e8d87134bdb46bd3912910.png)
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A.1 | B.2 | C.3 | D.4 |
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【推荐1】如图,
是矩形
的边
上一个动点,矩形的两条边
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的长分别为
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A.![]() ![]() | B.![]() ![]() | C.![]() ![]() | D.无法确定 |
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【推荐2】如图,两个边长都为
的正方形
和
,如果O点正好是正方形
的中心,而正方形
可以绕O点旋转,那么它们重叠部分的面积为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/7/5861b954-188e-455f-9095-a4751adeca08.png?resizew=184)
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A.4 | B.2 | C.1 | D.![]() |
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【推荐1】如图,正方形
和正方形
中,点D在
上,
,
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;②
;③
是等腰三角形;④
.正确的序号是( )
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A.①③ | B.①②③ | C.①③④ | D.①④ |
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【推荐2】如图,点P是正方形ABCD的对角线BD上一点,PE⊥BC与点E,PF⊥CD于点F,连接EF,给出的下列结论:①AP=EF;②∠PFE=∠BAP;③PD=EC;④PB2+PD2=2PA2,正确的个数有( )
![](https://img.xkw.com/dksih/QBM/2015/12/2/1573936512032768/1573936518332416/STEM/c20f609cc5ef4d14b450dbba3bcad161.png)
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A.1 | B.2 | C.3 | D.4 |
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