如图,在菱形
中,
,
,M为边
的中点,N为边
上一动点(不与点B重合),将
沿直线
折叠,使点B落在点E 处,连接
,
,当
为等腰三角形时,
的长为 .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/32436704a722d5e568ff5c175bf3c662.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc5c9827dfd0be5a9c85962d6ccbfb1.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411461db15ee8086332c531e086c40c7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d631f45bc652539853f236952afa5bbf.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/7785afeeaf274892253d04b4f693b367.png)
22-23九年级上·河南开封·期末 查看更多[4]
河南省开封市鼓楼区第十三中学2022-2023学年九年级上学期期末数学试题(已下线)专题1.5 特殊四边形中的折叠问题的四大题型-2023-2024学年九年级数学上册举一反三系列(北师大版)山东省济南市天桥区济南汇才学校2023-2024学年九年级上学期期中数学试题(已下线)2023—2024学年名校期末好题汇编(人教版八年级数学下册)——专题四—特殊的平行四边形
更新时间:2023-07-24 17:00:31
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【推荐1】在△ABC中,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc3d1db75c1e5df5dcfaa9b004e5d7b.png)
点D是直线BC上一动点, 连接AD,在直线
的右侧作等边
,连接CE,当线段CE的长度最小时,线段
的长度为___ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0dc3d1db75c1e5df5dcfaa9b004e5d7b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9953aa30372cd9d60d5b53d90d9414a5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a25c28359f8d8da9eaf4672a6cf8ae4f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9d78abbad68bbbf12af10cd40ef4c353.png)
![](https://img.xkw.com/dksih/QBM/2021/10/14/2829232714432512/2829369073827840/STEM/df1af83d-4519-41d4-b82e-e8884271cf74.png)
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【推荐2】如图,在直角坐标系中,点A的坐标是
,点B是x轴上的一个动点,将线段
绕点A逆时针旋转
至点C,连接
.在运动过程中,
的最小值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d49b9cf367521d7f92c0016ae7fae8e5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/828628c0876b45381c9a0edeb0fec236.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/5/19/32635799-26f2-4e78-bf31-62a02677ab3f.png?resizew=159)
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【推荐1】如图,在矩形
中,
,
,E为
的中点,F为线段
上一动点,P为
的中点,连接
,则线段
长的取值范围是_____ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21ea52361458ce2e49ed0fe99d8e6c02.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a9c3ec174b1ce835cc8737ff6ce57e52.png)
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【推荐2】如图,
直线
于点
,点
在直线
上(不与点
重合),连接
,将线段
绕点
顺时针旋转
,得到线段
,连接
,点
是
的中点,连接
,
,当
是等腰三角形时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/21f9157fce2a8339d281178c7c0bccbe.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0f85fca60a11e1af2bf50138d0e3fe62.png)
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【推荐1】如图,将矩形
沿着
翻折,使得点A、B、D恰好都落在点O处,且点G、O、C在同一条直线上,同时点E、O、F在另一条直线上,小炜同学得出以下结论:①
;②
;③
;④
;⑤
,其中正确的是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】如图,已知正方形ABCD的边长为6,E为边AB上一点且AE长为1,P为射线BC上一点.把△EBP沿EP折叠,点B落在点
处.若点
到直线AD的距离为3,则BP长为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3953cec61ac602ce5eb59b7912352179.png)
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【推荐1】如图,菱形ABCD周长为16,∠DAC=30°,E是AB的中点,P是对角线AC上的一个动点,则PE+PB的最小值是 _____ .
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【推荐2】已知三个边长分别为2,3,5的三个菱形如图排列,菱形的较小锐角为60°,则CF=__________ ,图中阴影部分的面积为__________ .
![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/7/c6af8573-43a3-4e26-8c45-446a16ebb60d.png?resizew=342)
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