如图,正方形ABCO和正方形DEFO的顶点A、E、O在同一直线上,且EF=
,AB=3,给出下列结论:①∠COD=45°;②AE=3+
;③CF=AD=
;④S△COF+S△EOF=
.期中正确的个数为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/1d36545f-1398-44d1-bb77-b48404531f4e.png?resizew=199)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cf298f00799cbf34b4db26f5f63af92f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e20838e72faf737614d76fcee82ab6c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/533a7b702ada1dd80123e4041271d521.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/1/1d36545f-1398-44d1-bb77-b48404531f4e.png?resizew=199)
A.1个 | B.2个 | C.3个 | D.4个 |
21-22九年级上·广东佛山·期中 查看更多[3]
更新时间:2021-12-18 13:15:57
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【推荐1】在
中,
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边上的高,
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【推荐2】如图,在Rt△ABC中,若
,AB=10,则△ABC的面积为( )
![](https://img.xkw.com/dksih/QBM/2022/1/10/2898568042135552/2946050403868672/STEM/0b6facd35fa34ff08ebcf6ff56c82da2.png?resizew=199)
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【推荐1】如图,在正方形
中,
,点
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分别是边
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分别是
,
的中点,则
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【推荐2】如图,E为正方形ABCD的对角线上一点,四边形EFCG为矩形,若正方形ABCD的边长为4,则EG+GC的长为( )
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