如图,在菱形ABCD中,∠BAD=60°,对角线AC、BD相交于点O将其绕着点O顺时针旋转90°得到菱形A‘B’C‘D’.若AB=1,则旋转前后两菱形重叠部分图形的周长为__________
![](https://img.xkw.com/dksih/QBM/2019/12/2/2346284353208320/2346988586024960/STEM/bbf6f8554b5442eaa06ff8d759a3328e.png?resizew=145)
更新时间:2019-12-14 10:37:30
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【推荐1】在△ABC中,∠C=90°,∠A=25°,点O是AB的中点,将OB绕点O向三角形外部旋转
角时(0°<
<180°),得到OP,当△ACP恰为轴对称图形时,
的值为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e170f206fdbbd834aad7580c727e2cc6.png)
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【推荐2】如图,在矩形
中,
,
,
是
边上的动点,连接
,将
绕点
逆时针旋转
得到
,连接
,则
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/efc6e4b936d7a800e839a30c3839574d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c02b54dc6b3e1bb6544f47d4c8743fcf.png)
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