如图1,已知长方形纸带
,
,
°,点
分别在边
上,
°,如图2,将纸带先沿直线
折叠后,点
分别落在
的位置,如图3,将纸带再沿
折叠一次,使点
落在线段
上点
的位置,那么![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
____________ °.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/67033072ff1a84ddf2bf3a71487e6c6f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/20d9a22edaf816e0975bd82f61de9df9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cf9b288c48c73463a2f214f02b6952a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2ba48366317ebea1c9dd5e4e67e03092.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/82dadce5dffcbe6f0372e574356dc377.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8c29a7e8eea08197bf53164a560bee58.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a8cf08f5ea353371bebe11a75d3ebc48.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9a6eae62e9b8d23a486c85642346db78.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73465a1f9aa03481295bf6bd3c6903ac.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ac047e91852b91af639feec23a9598b2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
22-23七年级下·上海普陀·期中 查看更多[3]
上海市普陀区2022-2023学年七年级下学期期中数学试题(已下线)专题02 矩形的性质与判定(八大类型)-2023-2024学年九年级数学上册《知识解读·题型专练》(北师大版)(已下线)专题07 期中填选压轴汇编【好题汇编】-备战2023-2024学年七年级数学下学期期中真题分类汇编(上海专用)
更新时间:2023-06-10 12:50:25
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【推荐2】在探索线与角的关系时,数学兴趣小组将一副学生用的三角板,按如图所示的方式摆放.已知
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【推荐1】如图,
和
是
分别沿着
、
边翻折
形成的,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6c6679b1ba0294dabb79d133cffb02f0.png)
_______ .
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【推荐2】如图,已知△ABC中,AC=3,BC=4,∠C=90°,将△ABC沿某直线折叠,使斜边两个端点A与B重合,折痕交BC,AB于点D,E,则△ACD的周长为_____ .
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