如图,把两个全等的矩形
和矩形
拼成如图所示的图案,连接
交
于点
,将
绕点
逆时针旋转,点
的运动轨迹交
于点
,若
,有以下四个结论:①
;②
;③
;④阴影部分的面积为
.其中一定成立的是______ .(把所有正确结论的序号填在横线上)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b1f13007c6d134c50004c62dc240707.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/abf80148409afb32ced0b4f59f1ba709.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c5db41a1f31d6baee7c69990811edb9f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/895dc3dc3a6606ff487a4c4863e18509.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/eebcdc1e6576fc15b1884ead714ce749.png)
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![](https://img.xkw.com/dksih/QBM/editorImg/2023/10/27/5cdc7513-d072-4046-bd18-7a3b5ddc2132.png?resizew=188)
更新时间:2020-01-09 13:23:58
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【推荐1】如图,在菱形ABCD中,
,线段AD上有一动点P(点P不与点A,D重合),沿直线BP将三角形ABP翻折,使得点A落在点E处.连接CE,在点P的运动过程中,下列结论:①
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【推荐2】如图,点C在线段AB上,△DAC是等边三角形,四边形CDEF是正方形.
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(2)点P是线段AE上的一个动点,连接PB,PC.若AC=2,BC=3,则PB+PC的最小值为____ .
(1)∠DAE=
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