坐标平面上的旋转探索（仅90度间隔）

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Rotate(A, Degrees, Center) → A'
3. Rotate(B, Degrees, Center) → B'
4. Rotate(C, Degrees, Center) → C'
5. Polygon(A', B', C') → poly1', c', a', b'
6. CircleArc(Center, C, C') → d
7. CircleArc(Center, B, B') → e
8. CircleArc(Center, A, A') → f
9. Line(D, E) → g
10. Line(F, G) → h
11. Line(F, G) → i
12. Line(E, D) → j
13. Line(Center, j) → k
14. Line(Center, i) → l
15. Polygon(Center, H, C) → poly2, c_1, center, h_1
16. Rotate(Center, Degrees, Center) → Center'
17. Rotate(H, Degrees, Center) → H'
18. Rotate(C, Degrees, Center) → C'_1
19. Polygon(Center', H', C'_1) → poly2', c'_1, center', h'