如图,在
中,
,将
绕点C逆时针旋转
得到△
,且
于点D,求
的度数( )
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/f6f3b53b-549d-435a-a7ed-1aa91b39795f.png?resizew=140)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0374c406b563f0d258aa5c2654bbd06e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/15c0dbe3c080c4c4636c64803e5c1f76.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/ad36099d4f257b472895e2c5209ea286.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3636b407d8818e15891e18db47fa0c9e.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bfdb87470309fa4521c5f073298377e0.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/782c7d1cd5581af8bd01341be6b23be3.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2024/1/18/f6f3b53b-549d-435a-a7ed-1aa91b39795f.png?resizew=140)
A.![]() | B.![]() | C.![]() | D.![]() |
更新时间:2024-01-18 20:27:51
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【推荐1】已知的三个内角满足
,则这是一个( )
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b41353a290d0dbbb75eb997e0bfedf81.png)
A.锐角三角形 | B.钝角三角形 | C.直角三角形 | D.无法确定 |
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【推荐2】如图,直线
,点
在直线
上,点
,
在直线
上,
,
,
于点
,则
( )
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645207465181184/2645810988974080/STEM/2f35c93f-6177-44c9-aee2-6505be30eea6.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8b757f0c42ae5c9a2d6a4b19e5877b27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8455657dde27aabe6adb7b188e031c11.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/3cc310194575262fb45352c2fbc19868.png)
![](https://img.xkw.com/dksih/QBM/2021/1/27/2645207465181184/2645810988974080/STEM/2f35c93f-6177-44c9-aee2-6505be30eea6.png)
A.![]() | B.![]() | C.![]() | D.![]() |
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【推荐1】如图,在Rt△ABC中,∠C=90°,∠ABC=30°,AC=
,将Rt△ABC绕点A逆时针旋转得到△AB'C',使点C落在AB边上,连接BB',则BB的长度是()
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928750032994304/2931811149963264/STEM/c5f18776-8f5a-478a-a49d-dc9d8df50718.png?resizew=131)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/2967337e3fcb228dded64ab0c41a17e0.png)
![](https://img.xkw.com/dksih/QBM/2022/3/4/2928750032994304/2931811149963264/STEM/c5f18776-8f5a-478a-a49d-dc9d8df50718.png?resizew=131)
A.5 | B.![]() | C.2![]() | D.![]() |
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【推荐2】如图是一个旋转对称图形,若将它绕自身中心旋转一定角度之后能与原图重合,则这个角度可能( )
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![](https://img.xkw.com/dksih/QBM/editorImg/2022/9/3/9c0148e3-a28c-4114-bd59-6e358cf6f887.png?resizew=105)
A.30° | B.45° | C.60° | D.90° |
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