Question

complete the following sentence. the figure below has rotational symmetry. is the smallest possible rotation that results in the figure being mapped onto itself. answer attempt 2 out of 2

Explanation:

Step1: 明确旋转对称概念

旋转对称是指图形绕着一个定点旋转一定角度后能与自身重合。

Step2: 分析图形

此图形为四叶星，绕中心旋转。

Step3: 计算最小旋转角度

因为一周是360°，该图形有4个相同部分，所以最小旋转角度为$360\div4 = 90$°。

Answer:

90