如图,已知
中,
,
,
,点D是AC边上的一个动点.将
沿BD所在直线折叠,点C的对应点为点E.如图,若
,则C,E两点之间的距离为________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ed10df4140819d5451773a45de66201b.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/4494a85de0be0b97a69348115aef8513.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/833cfda415649b832cc136caed392753.png)
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21-22八年级下·山西大同·期中 查看更多[5]
山西省大同市阳高县2021-2022学年八年级下学期期中数学试题(已下线)3.3 (附加2) 利用勾股定理解决折叠、展开等问题(练习)-2022-2023学年八年级数学上册同步精品课堂(苏科版)(已下线)专题1.12 线段的垂直平分线(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(北师大版)(已下线)专题18.14 勾股定理(折叠问题)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(沪科版)(已下线)专题17.14 勾股定理(折叠问题)(培优篇)(专项练习)-2022-2023学年八年级数学下册基础知识专项讲练(人教版)
更新时间:2022-08-10 13:40:09
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【推荐1】如图,在△
中,
,
分别是
,
上的点,
⊥
,
⊥
,垂足分别是
,
,若
,
,那么下面四个结论:①
;②
//
;③△
≌△
;④
,其中一定正确的是(填写编号)_____________ .
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解题方法
【推荐2】如图,在矩形
中,
.
为
中点,
是线段
(不含端点)上的动点,连结
.设
交于点
为
中点,连结
.在下列结论中:①
为
的垂直平分线;②
四点可能共圆;③
周长的最小值为
;④若
为
中点,则
为等边三角形.正确的是______ .(写出所有正确结论的序号)
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【推荐1】如图,等腰Rt△ABC中,∠BAC=90°,AB =AC = 2,点F是边BC上不与点B,C重合的一个动点,直线l垂直平分BF,垂足为D,当△AFC是等腰三角形时,BD的长为____ .
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【推荐2】如图,在正方形
中,点
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【推荐1】如图,矩形
,点E为
的中点.连接
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沿
折叠得到
,
交
于点O,
的长为______ .
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【推荐2】如图,在
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__________ .
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【推荐1】如图,已知在
中,
,
,
,点
是边
上一点,将
沿着
翻折,点
落在点
处,连接
,如果
,设
与边
交于点
,那么
的值是___________ .
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【推荐2】如图,
是
的直径,
,点C在线段
上运动,过点C的弦
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翻折交直线
于点F,当
的长为正整数时,线段
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