如图,在矩形ABCD中,E是BC边的中点,DE⊥AC,垂足为点F,连接BF,下列四个结论:①
CEF∽
ACD;②
=2;③sin∠CAD=
;④AB=BF.其中正确的结论有________ (写出所有正确结论的序号).
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b66ba239cbf38596abf32bfbedf66afd.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/7/23/975ea1f1-8ed1-44ea-8014-48dd6c598448.png?resizew=222)
更新时间:2017-02-28 14:46:37
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【推荐1】在菱形
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【推荐2】如图所示的三角形纸片中,.沿过点
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