如图.A、B、C三点在正方形网格线的交点处,若将
绕着点A逆时针旋转得到
,则
的值为______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/927c7ad4e25692d65a9168c48f34f211.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/01ed8db7a3f780139862bee48f81e842.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/2/18/bc033d24-2258-4988-adad-9102417ee235.png?resizew=104)
更新时间:2024-02-18 18:09:49
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【推荐1】如图,菱形草地
中,沿对角线修建60米和80米两条道路
,M、N分别是草地边
、
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【推荐2】如图,在平行四边形
中,过点
作
于点
,连接
,点
在线段
上,连接
,已知
,
,
.
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/18/78b0a66f-a907-4a00-b5dd-fd9b8adada10.png?resizew=157)
(1)若
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的中点,则平行四边形
的面积为______ ;
(2)若
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的长为______ .
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(1)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a0ed1ec316bc54c37c4286c208f55667.png)
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(2)若
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f4908c742e58c66ed0feb53a29b0dc20.png)
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【推荐1】如图,点P是正方形ABCD内一点,若
,
,
则![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b2a84b7de4bcbaa36f542b7ac3886bba.png)
______ .
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f3ad66112b09c909cab417085702ec00.png)
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【推荐2】如图,在
中,
,
,点
是
的中点,
是以点
为直角顶点的等腰直角三角形,线段
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2f8f88798ec42a58dccd212586382b23.png)
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【推荐1】如图,在正方形网格图中,每个小正方形的边长均为
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bdaa19de263700a15fcf213d64a8cd57.png)
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【推荐2】已知△ABC中,∠C=90°,AB=13,AC=5,则sinA=______ .
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