大卫之星参数化构造

GeoGebra 命令及参数

1. Polygon(A, C, D) → t1, d, a, c
2. Polygon(E, F, G) → t2, g, e, f
3. Intersect(d, f) → H
4. Intersect(c, g) → I
5. Point(e) → J
6. Polygon(H, I, J) → t3, j, h, i
7. Intersect(c, f) → K
8. Intersect(d, e) → L
9. Intersect(a, g) → M
10. Polygon(K, L, M) → t4, m, k, l
11. Polygon(E, A, G, C, F, D) → poly1, e_1, a_1, g_1, c_1, f_1, d_1
12. Polygon(A, N, G, S, E, O, D, P, F, Q, C, R) → poly2, a_2, r, g_2, s, n, e_2, o, d_2, p, f_2, q, c_2
13. Point(m) → T
14. Intersect(h, l) → U
15. Intersect(i, k) → V
16. Polygon(T, U, V) → t5, v, t, u
17. Intersect(j, l) → W
18. Intersect(i, m) → Z
19. Intersect(h, k) → A_1
20. Polygon(W, Z, A_1) → t6, b, w, z_1
21. Intersect(v, b) → B_1
22. Intersect(t, z_1) → C_1
23. Intersect(u, w) → D_1
24. Polygon(B_1, C_1, D_1) → t7, h_1, b_1, i_1
25. Intersect(u, b) → E_1
26. Intersect(v, z_1) → F_1
27. Intersect(t, w) → G_1
28. Polygon(E_1, F_1, G_1) → t8, j_1, k_1, l_1
29. Intersect(i_1, j_1) → H_1
30. Intersect(h_1, k_1) → I_1
31. Intersect(b_1, l_1) → J_1
32. Polygon(H_1, I_1, J_1) → t9, m_1, n_1, p_1
33. Intersect(h_1, j_1) → K_1
34. Intersect(i_1, l_1) → L_1
35. Intersect(b_1, k_1) → M_1
36. Polygon(K_1, L_1, M_1) → t10, q_1, r_1, s_1
37. Intersect(m_1, q_1) → N_1
38. Intersect(n_1, s_1) → O_1
39. Intersect(p_1, r_1) → P_1
40. Polygon(N_1, O_1, P_1) → t11, t_1, h_2, o_1
41. Intersect(p_1, q_1) → Q_1
42. Intersect(m_1, s_1) → R_1
43. Intersect(n_1, r_1) → S_1
44. Polygon(Q_1, R_1, S_1) → t12, i_2, j_2, k_2
45. Intersect(o_1, i_2) → T_1
46. Intersect(t_1, j_2) → U_1
47. Intersect(h_2, k_2) → V_1
48. Polygon(T_1, U_1, V_1) → t13, v_1, l_2, u_1
49. Intersect(t_1, i_2) → W_1
50. Intersect(h_2, j_2) → Z_1
51. Intersect(o_1, k_2) → A_2
52. Polygon(W_1, Z_1, A_2) → t14, m_2, w_1, n_2
53. Intersect(v_1, n_2) → B_2
54. Intersect(l_2, m_2) → C_2
55. Intersect(u_1, w_1) → D_2
56. Polygon(B_2, C_2, D_2) → t15, p_2, b_2, q_2
57. Intersect(l_2, w_1) → E_2
58. Intersect(v_1, m_2) → F_2
59. Intersect(u_1, n_2) → G_2
60. Polygon(E_2, F_2, G_2) → t16, r_2, s_2, t_2
61. Intersect(p_2, s_2) → H_2
62. Intersect(b_2, r_2) → I_2
63. Intersect(q_2, t_2) → J_2
64. Polygon(H_2, I_2, J_2) → t17, f_3, g_3, h_3
65. Intersect(q_2, s_2) → K_2
66. Intersect(p_2, r_2) → L_2
67. Intersect(b_2, t_2) → M_2
68. Polygon(K_2, L_2, M_2) → t18, i_3, j_3, k_3
69. Intersect(h_3, i_3) → N_2
70. Intersect(f_3, j_3) → O_2
71. Intersect(g_3, k_3) → P_2
72. Polygon(N_2, O_2, P_2) → t19, l_3, m_3, o_2
73. Intersect(g_3, j_3) → Q_2
74. Intersect(f_3, i_3) → R_2
75. Intersect(h_3, k_3) → S_2
76. Polygon(Q_2, R_2, S_2) → t20, n_3, p_3, q_3
77. Intersect(l_3, p_3) → T_2
78. Intersect(m_3, n_3) → U_2
79. Intersect(o_2, q_3) → V_2
80. Polygon(T_2, U_2, V_2) → t21, v_2, r_3, u_2
81. Intersect(o_2, p_3) → W_2
82. Intersect(l_3, n_3) → Z_2
83. Intersect(m_3, q_3) → A_3
84. Polygon(W_2, Z_2, A_3) → t22, a_3, w_2, z_2
85. Intersect(u_2, a_3) → B_3
86. Intersect(v_2, w_2) → C_3
87. Intersect(r_3, z_2) → D_3
88. Polygon(B_3, C_3, D_3) → t23, d_3, b_3, c_3
89. Intersect(u_2, z_2) → E_3
90. Intersect(v_2, a_3) → F_3
91. Intersect(r_3, w_2) → G_3
92. Polygon(E_3, F_3, G_3) → t24, s_3, e_3, t_3