How to cut the attached pages of mathematics in the first volume of the sixth grade;

① The circles are completely coincident, and the square rotates 90 degrees once and four times at a time. Rotation of equilateral triangle 120 degree overlaps once, and rotation overlaps three times.

(2) Cut out the circular squares and triangles attached to 1 page, mark the center point A, overlap each figure with the corresponding figure below, and then rotate the figure along the center point A. What do you find? Why?

(3) The circles are completely coincident, and the square rotates 90 degrees once and four times at a time. Rotation of equilateral triangle 120 degree overlaps once, and rotation overlaps three times.