拉马努金近似计算圆周率

GeoGebra 命令及参数

1. Point(yAxis) → O
2. Circle(O, 1) → c
3. Point(c) → A
4. Line(A, O) → f
5. Intersect(c, f, 2) → B
6. Segment(A, B) → t
7. OrthogonalLine(O, f) → g
8. Intersect(c, g, 2) → C
9. Rotate(O, (-(15°)), A) → O'
10. Angle(O', A, O) → α
11. Ray(A, O') → h
12. Circle(A, 0.3) → d
13. Intersect(d, h, 1) → D
14. Circle(D, A) → e
15. Intersect(e, h, 2) → E
16. Circle(E, D) → k
17. Intersect(k, h, 2) → F
18. ArcoyPunto(A, D) → p
19. ArcoyPunto(D, E) → q
20. ArcoyPunto(E, F) → r
21. Segment(F, O) → i
22. Line(D, i) → j
23. Intersect(j, t) → T
24. Segment(B, C) → l
25. Circle(C, Segment[A, T]) → s
26. Intersect(s, l, 1) → M
27. ArcoyPunto(C, M) → d_1
28. Circle(M, C) → c_1
29. Intersect(c_1, l, 2) → N
30. ArcoyPunto(M, N) → e_1
31. Segment(A, M) → m
32. Segment(A, N) → n
33. Circle(A, M) → f_1
34. Intersect(f_1, n, 1) → P
35. CircleArc(A, P, M) → g_1
36. Line(P, l) → b
37. Intersect(b, m) → Q
38. Segment(Q, P) → s_1
39. Segment(O, Q) → h_1
40. Line(T, h_1) → i_1
41. Intersect(i_1, m) → R
42. Segment(T, R) → j_1
43. Tangent(A, c) → k_1,
44. Circle(A, R) → p_1
45. Intersect(p_1, k_1, 1) → S
46. Segment(A, S) → m_1
47. CircleArc(A, S, R) → q_1
48. Segment(O, S) → l_1
49. Polygon(A, R, T) → V1, t_1, a, r_1
50. Polygon(A, Q, O) → V2, o, a_1, q_2
51. Polygon(A, Q, P) → V3, p_2, a_2, q_3
52. Polygon(A, M, N) → V4, n_1, a_3, m_2
53. Polygon(A, N, B) → V5, b_1, a_4, n_2
54. Angle(N, B, A) → β
55. Polygon(A, M, B) → V6, b_2, a_5, m_3