旋轉對稱

透過用手指觸控旋轉圖形，讓學生學習旋轉對稱的概念。

Keywords: eph, 教育出版社, 小學數學新思維, 旋轉對稱 Through with your fingers touch rotating graphics, allows students to learn the concept of rotational symmetry.

Keywords: eph, Education Press, elementary school mathematics new thinking, rotational symmetry