等角变换!!!

GeoGebra 命令及参数

1. Rotate(A, 108°, B) → A'
2. Angle(A, B, A') → α
3. Ray(B, A) → f
4. Ray(B, A') → g
5. Point(f) → C
6. Rotate(B, (-(108°)), C) → B'
7. Angle(B', C, B) → β
8. Ray(C, B') → h
9. Point(h) → D
10. Rotate(C, (-(108°)), D) → C'
11. Angle(C', D, C) → γ
12. Ray(D, C') → i
13. Point(i) → E
14. Rotate(D, (-(108°)), E) → D'
15. Angle(D', E, D) → δ
16. Ray(E, D') → j
17. Intersect(g, j) → F
18. Polygon(F, B, C, D, E) → poly1, f_1, b, c, d, e
19. Segment(F, E) → k
20. Segment(E, D) → l
21. Segment(D, C) → m
22. Segment(C, B) → n
23. Segment(B, F) → p
24. Min(list) → a
25. Circle(B, (0.2 * a)) → q
26. Intersect(q, p) → H,
27. Intersect(q, n) → I,
28. CircleSector(B, I, H) → r
29. Dilate(B, If[0 < o ≤ 1, 1 - o, 0], C) → B'_1
30. Vector(B, B'_1) → u
31. Translate(r, u) → r'
32. Rotate(r', If[1 < o ≤ 2, (((o - 1) * 2) * π / 5), (2 * π / 5)], C) → r''
33. Dilate(C, If[2 < o ≤ 3, 3 - o, 0], D) → C'_1
34. Vector(C, C'_1) → v
35. Translate(r'', v) → r'''
36. Rotate(r''', If[3 < o ≤ 4, (((o - 3) * 2) * π / 5), (2 * π / 5)], D) → s
37. Dilate(D, If[4 < o ≤ 5, 5 - o, 0], E) → D'_1
38. Vector(D, D'_1) → w
39. Translate(s, w) → s'
40. Rotate(s', If[5 < o ≤ 6, (((o - 5) * 2) * π / 5), (2 * π / 5)], E) → s''
41. Dilate(E, If[6 < o ≤ 7, 7 - o, 0], F) → E'
42. Vector(E, E') → t
43. Translate(s'', t) → s'''
44. Rotate(s''', If[7 < o ≤ 8, (((o - 7) * 2) * π / 5), (2 * π / 5)], F) → c_1