图形自旋转动画：圆与多边形的旋转变换

GeoGebra 命令及参数

1. Circle(A_{1}, B_{1}) → c
2. Circle(B_{1}, A_{1}) → d
3. Intersect(c, d, 1) → B
4. Line(A_{1}, B_{1}) → f
5. Point(f) → D_{1}
6. Circle(D_{1}, Radius[d]) → e
7. Intersect(e, f, 1) → E
8. Circle(E, Radius[e]) → g
9. Intersect(e, g, 2) → C
10. Intersect(d, f, 1) → A
11. Intersect(c, f, 1) → H
12. Intersect(g, f, 2) → D
13. Polygon(A_{1}, B, C, D_{1}) → q1, a, c_1, f_1, d_1
14. Polygon(A_{1}, B, C, D_{1}) → q2, a_1, c_2, f_2, d_2
15. LineBisector(c_2) → h
16. OrthogonalLine(B, d_2) → i
17. Intersect(i, d_2) → F
18. Segment(B, F) → j
19. LineBisector(j) → k
20. Intersect(h, k) → P
21. Circle(P, D_{1}) → p