如图,在平面内将五角星绕其中心旋转
后所得到的图案是( )
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753268465401856/2753288288280576/STEM/6c57900b-a778-4a70-9e13-63337894b87b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfe639eab78eafd2d40ea70aa5d3f21d.png)
![](https://img.xkw.com/dksih/QBM/2021/6/29/2753268465401856/2753288288280576/STEM/6c57900b-a778-4a70-9e13-63337894b87b.png)
A.![]() | B.![]() |
C.![]() | D.![]() |
2021·湖南永州·中考真题 查看更多[7]
(已下线)湖南省永州市2021年中考真题数学试卷(已下线)专题07 图形的旋转(重难点突破)-【练好重点题】2021-2022学年九年级数学上学期综合训练卷(人教版)2022学年新疆初中学业水平检测第一次数学模拟考试 (已下线)第二章几何图形的初步认识(B卷-拔高卷)-【单元测试】2022-2023学年七年级数学分层训练AB卷【冀教版】河南省许昌市2023-2024学年九年级上学期期中数学试题2024年广西柳州市 九年级数学一模模拟试题2024年广西玉林市容县部分学校中考一模数学模拟试题
更新时间:2021-06-29 09:22:16
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【推荐1】如图,在
ABC中,∠ACB=90°,∠A=30°,BC=4,将
ABC绕点C按顺时针方向旋转
°后,得到
EDC,此时,点D在AB边上,斜边DE交AC边于点F,则
的大小,图中阴影部分的面积分别为( )
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701697704673280/2704527980404736/STEM/27f12125-80f5-4514-bd15-aefd9a907d30.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ce4cba95fc7d4853a243f8e3fb20ce70.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b6a24198bd04c29321ae5dc5a28fe421.png)
![](https://img.xkw.com/dksih/QBM/2021/4/17/2701697704673280/2704527980404736/STEM/27f12125-80f5-4514-bd15-aefd9a907d30.png)
A.30,4 | B.60,4 | C.60,![]() | D.60,![]() |
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【推荐2】在
中,
,
,
,将
以点C为中心顺时针旋转
,得到
,连接BE、AD.下列说法错误的是( )
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/3a229b82-def3-4483-894a-10a46df893ac.png?resizew=146)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/a355958abf7dc0f2eb949584cb87907b.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/aa7aeb2a8d1437eeb4482c3b6ad9f315.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8413eaf0283f7b03c83da8e0b9fc97c5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0468237bbc0d3df77435d98b817c10c0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2689f0ce5ab3467d8214794d8acb2bd6.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/12/3a229b82-def3-4483-894a-10a46df893ac.png?resizew=146)
A.![]() | B.![]() | C.![]() | D.![]() |
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