In junior high school mathematics, figure rotation in geometry is one of the most difficult topics. It is not enough to solve this kind of problem by yourself. What junior high school students lack most is induction and summary, and summarizing the method of solving problems is the main purpose of doing problems.

1, equilateral triangles cross and rotate.

2. Square rotation

3. Diagonal complementary quadrilateral rotation

4, isosceles right triangle half angle rotation

5. Half-angle rotation of square

6, right triangle cross rotation-fermat point.

7. Maximum rotation value

8. Similar rotation