如图,已知
为等腰三角形,
,
的垂直平分线交
于D.若
的周长为
,则
的底边![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
______________
.
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e633119100faca0e8ad801d2bb050f5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0005e1ef60f6ddc5f9a83e3de1ef3b2e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6eb6ba6a20d59ed6800fdd0e2ca5727c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/16ca90e8a784f990c4097eec9219908d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9efa9fbcfb9595e2f031aa691db4564b.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/18/ae960c52-5d8e-4f07-b60f-91695594b4a9.png?resizew=82)
更新时间:2023-12-18 20:08:34
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【推荐1】已知∠MAN=90°,在射线AM上取一点B,在射线AN上取一点C,连接BC,再作点A关于直线BC的对称点D,连接AD,BD,得到如下图形.移动点C,当AD=BC时,∠ABD=______ ;当2AD=BC时,∠ABD的度数是______ .
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【推荐2】如图,在直角△ABC中,已知∠ACB=90°,AB边的垂直平分线交AB于点E,交BC于点D,且∠BAD=15°,BD=18cm,则AC的长是_____ cm.
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【推荐1】用一条长18cm的细绳围成一个等腰三角形,若有一边长是8cm,则所围成等腰三角形的底边长为______ cm.
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【推荐2】如图,在平面直角坐标系中,点
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