如图,△ABC中,AB=2,∠ABC=60°,∠ACB=45°,点D在直线BC上运动,连接AD,在AD的右侧作△ADE∽△ABC,点F为AC中点,连接EF,则EF的最小值为 _____ .
![](https://img.xkw.com/dksih/QBM/2022/2/20/2920271661760512/2923197883539456/STEM/b0a2bf74-dc71-4d76-b606-3ac26fbb7c14.png?resizew=317)
21-22九年级上·四川成都·期末 查看更多[3]
更新时间:2022-02-24 10:44:13
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【推荐1】如图,在
的网格中,每一个小正方形的边长都是1,点
,
,
,
都在格点上,连接
,
相交于
.那么
的大小是_____ .
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【推荐2】已知四边形
为矩形,
,E,F,G分别是
上的点,且
,若
,则
面积的最小值为_____________ ;
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐1】在边长为
的正方形
中,点
是边
上的动点(不与
重合),连接
,将
沿
向右翻折得
,连接
和
,若
为等腰三角形,则
的长为_____________________
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【推荐2】如图,菱形
的对角线
和
交于点
,点
在射线
上,且
,过点
作
交射线
于点
,过点
作
的垂线,与过点
作
的垂线交于点
,得到矩形
射线
交线段
于点
,将
沿直线
折叠,得到
,当点
在矩形
的边上时,![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e261c7c43d26f88b61af4562584d26f3.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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