如图,将四根长度相等的细木条首尾相连,用钉子钉成四边形
,若
,
,则B,D两点间的距离为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/305a88d4e0249bd16d48eda01331d2d4.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/282836891c171f38f62306a52106fd32.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/4/10/dea53935-0f1a-4531-992a-c5a39762c528.png?resizew=174)
更新时间:2024-04-10 00:17:41
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【推荐1】线段
,M为
的中点,动点 P 到点 M 的距离是1,连接
,线段
绕点P 逆 时针旋转
得到线段
,连接
,则线段
长度的最小值是____________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f7bae5203f4b4acf23779114b3466e17.png)
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【推荐2】线段
,在直线
上截取线段
,
为线段
的中点,
为线段
的中点,那么线段![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9bef73c2ebba9e1beed904ce8057e99f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
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【推荐1】等腰直角
中,
,
,点
是平面内一点,
,连接
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绕
点逆时针旋转90°得到
,连接
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________ (填度数)度时,
可以取最大值,最大值等于________ .
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
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【推荐2】如图,△ABC中,AB=AC,AD⊥BC,D是垂足,CG∥AB,BG分别交AD,AC于点E,F,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0cfee23d67abf4c9ba1542bc30f378fc.png)
________ .
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【推荐1】如图,剪两张对边平行的纸条,随意交叉叠放在一起,重合的部分构成了一个四边形,转动其中一张纸条,则下列相等关系:①AD=AB;②AD=BC;③∠DAC=∠ACD;④AO=BO,其中一定成立的是 _____ .(只填序号)
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名校
【推荐2】如图,在菱形
中,
°,在对角线
上任取一点Р(端点除外),连接
、
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.当点Р在线段
上移动时:①
;②当点P沿CA方向运动时,
的度数先变小,后变大;③
;④
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【推荐1】如图,在
中,
是边
上一点,过点
作
交
于点
,过点
作
的平行线交
的延长线于点
,连接
交
于点
,设
的面积为
,
的面积为
,
的面积为
,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c96e57c0595d832191594d11a1a0f15f.png)
______ .
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【推荐2】如图,将
纸片按如图所示的方式折叠,使点
落在边
上,记为点
,折痕为
,已知
,
,
,若以
为直角三角形,那么
的长度是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
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