1 . 综合与探究
如图,在平面直角坐标系中,点
的坐标分别为
和
,且
满足
.将矩形
沿对角线
所在的直线折叠,点B落在点D处,
与y轴相交于点E.
(1)
___________,
___________;
(2)试证明
≌
,并直接写出点E的坐标;
(3)若点F是线段
上的一个动点,则
的最小值为___________;
(4)平面内是否存在点M与点N使四边形
为正方形?若存在,请直接写出点M的坐标;若不存在,请说明理由.
如图,在平面直角坐标系中,点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62e478787ebfeb68a5a7594dbd9eecd4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ef4a90cfdbfa05577b6ec0b22739e7c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fabe33b24e9cabf7a5530bc75d37da2a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62ff2912fd8d93b6e692936d95b727c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8304a3abd0c3bff2e9bff7c4093ae8b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3241d7fedd89d85711acd7a2635298af.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9e52a8f07834cbbbe4224962672fbbb2.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/6/5/0d696154-5ec1-4234-81ce-3096bd986f05.png?resizew=164)
(1)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/380bbacf854e30e2e747fc286d2b9997.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5ccd4162c7d09f970cb77cadacdbe521.png)
(2)试证明
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0e72a855bb6d80737099e412ed52a26b.png)
(3)若点F是线段
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6a32e98967ce1cd545e9cf4eb877cbba.png)
(4)平面内是否存在点M与点N使四边形
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad2de15162b13ba943f8da2498580cf9.png)
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