用欧拉锯齿数近似π的几何作图方法

GeoGebra 命令及参数

1. Sum(D5:E5) → D6
2. Sum(C5:E5) → E6
3. Sum(B5:E5) → F6
4. Sum(E5:E5) → C6
5. Sum(B3:C3) → D4
6. Sum(C4:D4) → D5
7. Sum(B4:D4) → E5
8. Sum(E6:F6) → D7
9. Sum(D6:F6) → E7
10. Sum(C6:F6) → F7
11. Sum(B6:F6) → G7
12. Sum(F7:G7) → D8
13. Sum(E7:G7) → E8
14. Sum(D7:G7) → F8
15. Sum(C7:G7) → G8
16. Sum(B7:G7) → H8
17. Sum(G8:H8) → D9
18. Sum(F8:H8) → E9
19. Sum(E8:H8) → F9
20. Sum(D8:H8) → G9
21. Sum(C8:H8) → H9
22. Sum(B8:H8) → I9
23. Sum(H9:I9) → D10
24. Sum(G9:I9) → E10
25. Sum(F9:I9) → F10
26. Sum(E9:I9) → G10
27. Sum(D9:I9) → H10
28. Sum(C9:I9) → I10
29. Sum(B9:I9) → J10
30. Sum(I10:J10) → D11
31. Sum(H10:J10) → E11
32. Sum(G10:J10) → F11
33. Sum(F10:J10) → G11
34. Sum(E10:J10) → H11
35. Sum(D10:J10) → I11
36. Sum(C10:J10) → J11
37. Sum(B10:J10) → K11
38. Sum(J11:K11) → D12
39. Sum(I11:K11) → E12
40. Sum(H11:K11) → F12
41. Sum(G11:K11) → G12
42. Sum(F11:K11) → H12
43. Sum(E11:K11) → I12
44. Sum(D11:K11) → J12
45. Sum(C11:K11) → K12
46. Sum(B11:K11) → L12
47. Intersect(xAxis, yAxis) → A
48. Point(yAxis) → B
49. Point(xAxis) → C
50. Point(xAxis) → G
51. Segment(A, B) → a
52. Segment(C, F) → b
53. Segment(G, I) → c
54. Segment(B, F) → d
55. Segment(F, I) → e
56. Point(xAxis) → J
57. Point(xAxis) → M
58. Point(xAxis) → Q
59. Segment(J, L) → f
60. Segment(M, P) → g
61. Segment(Q, R) → h
62. Segment(L, P) → i
63. Segment(P, R) → j
64. Intersect(xAxis, yAxis) → S
65. Point(yAxis) → T
66. Point(xAxis) → U
67. Point(xAxis) → A_1
68. Point(xAxis) → D_1
69. Point(xAxis) → I_1
70. Point(xAxis) → K_1
71. Point(xAxis) → P_1
72. Point(xAxis) → S_1
73. Point(xAxis) → W_1
74. Point(xAxis) → B_2
75. Point(xAxis) → F_2
76. Point(xAxis) → H_2
77. Point(yAxis) → M_2
78. Point(yAxis) → N_2
79. Point(yAxis) → O_2
80. Segment(S, T) → m
81. Segment(U, Z) → n
82. Segment(A_1, C_1) → p
83. Segment(D_1, H_1) → q
84. Segment(I_1, J_1) → r
85. Segment(K_1, O_1) → s
86. Segment(P_1, R_1) → t
87. Segment(S_1, V_1) → a_1
88. Segment(W_1, A_2) → b_1
89. Segment(B_2, E_2) → c_1
90. Segment(F_2, G_2) → d_1
91. Segment(H_2, L_2) → e_1
92. Segment(M_2, O_2) → f_1
93. Segment(P_2, B_3) → g_1
94. Segment(T_2, U_2) → h_1
95. Segment(V_2, A_3) → i_1
96. Segment(C_3, P_3) → j_1
97. Segment(F_3, J_3) → k_1
98. Segment(K_3, L_3) → l_1
99. Segment(M_3, O_3) → m_1
100. Segment(T, Z) → n_1
101. Segment(Z, C_1) → p_1
102. Segment(C_1, H_1) → q_1
103. Segment(J_1, O_1) → r_1
104. Segment(O_1, R_1) → s_1
105. Segment(R_1, V_1) → t_1
106. Segment(A_2, E_2) → a_2
107. Segment(E_2, G_2) → b_2
108. Segment(G_2, L_2) → c_2
109. Segment(O_2, B_3) → d_2
110. Segment(B_3, U_2) → e_2
111. Segment(U_2, A_3) → f_2
112. Segment(P_3, J_3) → g_2
113. Segment(J_3, L_3) → h_2
114. Segment(L_3, O_3) → i_2