如图,已知在矩形
中,
,
,点M,N分别在边
和
上,沿着
折叠矩形
,使点A的对应点
始终落在边
上,点D的对应点为点
,连接
,
,则下列结论正确的有______ (填序号).
①若点
是
边的中点,则
;
②折痕
长度的取值范围为
;
③当
时,点M是边
的一个四等分点;
④连接
,当
时,
是等腰直角三角形.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9f08273d339dc5ddbb89aa67bb8205e6.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e65a3e478bb87d094e3a0af30dd10ae8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e5b3bd5e6bc2a0a277d279bb01af9584.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6024fd4532f5f981deac4582c799a6ef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/23/9d22a8a9-6c8c-4db2-8d1c-241bad9cc72b.png?resizew=164)
①若点
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e7c314398e26ffc7164b82946eeb4273.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/66a12b674f9e23a3190ae1f16a93d427.png)
②折痕
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3a4090ba348ed8fca149c2d76e53b7a0.png)
③当
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/13723986fb12461be02262360ed3fe3b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
④连接
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c4c865445dda4a59b6d5cb18fd74404.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efdf66ffc53cb4264b15f1f6703251a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e3e28d3e87726ee8825d681af6ecb7df.png)
2023·辽宁丹东·一模 查看更多[1]
更新时间:2023-05-12 07:56:44
|
相似题推荐
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【推荐1】如图,在矩形纸片
中,
分别为边
中点,G,H分别为边
上的一点,且
,连接线段
,现折叠纸片,点A,C的对应点分别为
,
,
的延长线交边
于点P,
的延长线交
于点Q,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/26c69a9feb14d4b9ccba6ae42837fd73.png)
______ .
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名校
【推荐2】在数学拓展课上,蔡老师给大家讲了一个有趣的定理:若点C,D在线段
所在直线的两侧,并且
,那么A,B,C,D四个点在同一个圆上.小雅同学在学习了该定理后积极思考:若限定正三角形的顶点都只能在正方形的边上,则她可以很快在边长为2的正方形纸片上剪出一个面积最大的正三角形,请你计算一下小雅剪出的这个正三角形的边长为____ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9c8163d5cec68e5b0c68a71e880e9cbb.png)
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【推荐1】如图,在矩形
中,
,
,点
是
的中点,连接
,
沿着
翻折得到
,
交
于点
,则
的值为___________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fcd0ced286a0fbc7e4862f8147264277.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3f8eeeea1c9652cacce976f8129cf520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2a30f3a8b673cc28bd90c50cf1a35281.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4eedae8d316c76e3d0b451256de03fb9.png)
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【推荐2】如图,以矩形OABC的顶点O为原点,OA为x轴,OC为y轴建立平面直角坐标系,双曲线y=
与AB、BC分别交于点D、E,沿直线DE将△DBE翻折得△DFE,且点F恰好落在直线OA上,若AB:BC=4:5,则矩形的面积是__ .
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/10/20/10fda56a-66d7-4604-b80c-dcbc10e5b9a4.png?resizew=195)
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【推荐1】如图,边长为3的正方形
的对角线
与
相交于点
,点
在
上且
,连接
,过点
作
于点
,把
绕点
顺时针旋转
得到线段
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的长为__________ .
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【推荐2】如图,在矩形ABCD中,AB=6,AD=10,点E在边AD上运动,将△DEC沿EC翻折,使点D落在点D'处,若△DEC有两条边存在2倍的数量关系,则点D'到AD的距离是_______ .
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【推荐1】如图1和图2,在
中,
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在
边上,点
分别在
边上,且
,点
从点
出发沿折线
匀速移动,到达点
时停止;点
在
边上随
移动,且始终保持
.在点
处设计并安装一扫描器,按定角
扫描
区域(含边界),扫描器随点
从
到
再到
共用时44秒.若
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被扫描到的总时长为________ 秒.
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【推荐2】如图,在平面直角坐标系中,等边
的边
在
轴正半轴上,点
,
,点
、
分别从
、
出发以相同的速度向
、
运动,连接
、
交于点
,
是
轴上一点,则
的最小值为______ .
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