如图,边长为2的正六边形
放置于平面直角坐标系中,边
在x轴正半轴上,顶点F在y轴正半轴上,将正六边形
绕原点O旋转
,则旋转后顶点D的坐标为( )
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987010530656256/2989150400241664/STEM/81125200-b690-4533-9ebb-748a99ca9c64.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f52a58fbaf4fea03567e88a9f0f6e37e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9165d9bfbb0f0d19eb482c2a4c1b29b7.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://img.xkw.com/dksih/QBM/2022/5/25/2987010530656256/2989150400241664/STEM/81125200-b690-4533-9ebb-748a99ca9c64.png?resizew=140)
A.![]() | B.![]() | C.![]() | D.![]() |
2022·吉林长春·模拟预测 查看更多[2]
更新时间:2022-05-28 15:04:58
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【推荐1】如图,在菱形
中,
,
、
分别是
、
的中点,
、
相交于点
,连接
、
.给出以下结论,其中不正确的有( )
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A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐2】如图,正六边形
的顶点
,
分别在正方形
的边
,
上.若正方形的边长为
,则正六边形的边长为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/1019c0405370c673e37b46c066eba839.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5963abe8f421bd99a2aaa94831a951e9.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/cafbe2751f4f4c5a8e676818195e9111.png)
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【推荐1】如图,在正方形
和正方形
中,
在
上,连接
并延长,交
于
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/411b38a18046fea8e9fab1f9f9b80a5f.png)
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【推荐2】如图,等腰△ABC中,AB=AC=10cm,BC=12cm,D为BC上一点,连接AD,E为AD上一点,连接BE,若∠ABE=∠BAE═
∠BAC,则DE的长为( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/2/25/71f8e041-d948-4255-8bd9-2dde33ed07a0.png?resizew=188)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f89eef3148f2d4d09379767b4af69132.png)
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【推荐1】若正六边形的内切圆半径为
,则其外接圆半径为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a7ffe8515ff6183c1c7775dc6f94bdb8.png)
A.4 | B.2 | C.![]() | D.3 |
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【推荐2】在2022年北京冬奥会开幕式和闭幕式中,一片“雪花”的故事展现了“世界大同、天下一家”的主题,让世界观众感受了中国人的浪漫.如图,将“雪花”图案(边长为4的正六边形
)放在平面直角坐标系中,若
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轴垂直,顶点A的坐标为
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【推荐1】如图,在
中,顶点
,
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与正方形
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,则第2025次旋转结束时,点D的坐标为( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3fe95f656b98b53f71a9d72bf0c9a4b9.png)
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【推荐2】如图,在平面直角坐标系中,已知点A(0,2),点B在第一象限内,AO=AB,∠OAB=120°,将△AOB绕点O逆时针旋转,每次旋转60°,则第2021次旋转后,点B的坐标为( )
![](https://img.xkw.com/dksih/QBM/2021/12/28/2889380230103040/2948668694872064/STEM/98b9bb73-6b6a-467e-8801-23fbc7668187.png?resizew=261)
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