如图,在
中,对角线
交于点O,
于点E,若
,则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
_______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5138a9f70d5e8b0580e30fef6eb7baef.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/73b3c032441543354c154ee67d744abb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d66632083b133ce6a7084f3d15f43624.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b302f8a3282e74b01ae69eff555b49b9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/404728d0ea2699c71e674f30dd984abd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/8/22/57755ddc-b856-4baa-8df8-6359fd1ec4ca.png?resizew=213)
更新时间:2022-08-19 22:44:29
|
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解题方法
【推荐1】如图,在直角三角形
中,
,并且
在直线l上,将
绕点A顺时针旋转到位置①处,得到点
,将位置①的三角形绕点P顺时针旋转到位置②处,得到点
,…,按此规律继续旋转,直到得到点
为止(
,
,
…在直线l上).则:![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c729380d78bd0fc7d7425e6940483b31.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c1ed58c428f944c18338f7d0467c9e89.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d3d88909e5fcc68bc96d756f2d65060c.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2708fa6298e52f617383efc175b71ddc.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9b9cb8e6ff801523b0304576cd69fd2d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/797e67927616b141ed7c6b83f8b6f4fb.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/c729380d78bd0fc7d7425e6940483b31.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/6/b63ad0a2-a2a4-4009-8cfe-b2c803b33991.png?resizew=303)
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【推荐1】如图,已知四边形
是平行四边形,若
分别是
的平分线,
,则
的长是______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7a6824cd221701c7fe3f8cb4db5d6a9.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1befb656d7add6e5536c39fcfb265a8d.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/00cf7cae66d14f85bdf49a3f27b58f1b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/49b50357a6545cae8348e3059312f520.png)
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【推荐2】如图,在边长为2的等边
中,
是
上一动点,连接
,以
、
为邻边作平行四边形
,则对角线
的最小值为__________ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/60ef95894ceebaf236170e8832dcf7e3.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d40b319212a7e7528b053e1c7097e966.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/03902478df1a55bc99703210bccab910.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/62c54e84a3ae17ffe31eb37f05f1aaa2.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e6e490f703eb6c9bb1278c78ebc2d661.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/24/e765d87d-35c8-4ddb-b4dc-55103869edc5.png?resizew=161)
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