正方体在平面上的投影

GeoGebra 命令及参数

1. Circle(I_1, 0.6) → k_2
2. Point(k_2) → K_1
3. Point(k_2) → J_1
4. Angle(J_1, I_1, K_1) → b_1
5. Circle(I, 0.6) → k_1
6. Point(k_1) → K
7. Point(k_1) → J
8. Angle(J, I, K) → a_1
9. Segment(A', B') → i
10. Segment(B', C') → j
11. Segment(C', D') → k
12. Segment(D', A') → l
13. Segment(B', F') → m
14. Segment(F', E') → n
15. Segment(A', E') → p
16. Segment(E', H') → r
17. Segment(G', H') → s
18. Segment(G', F') → t
19. Segment(G', C') → i_1
20. Segment(H', D') → j_1
21. Ray(A', A) → l_1
22. Ray(B', B) → m_1
23. Ray(F', F) → n_1
24. Ray(E', E) → p_1
25. Ray(G', G) → q_1
26. Ray(H', H) → r_1
27. Ray(D', D) → s_1
28. Ray(C', C) → t_1
29. Ellipse(L, M, N) → p_2
30. Segment(A, B) → c
31. Segment(A, E) → d
32. Segment(E, F) → e
33. Segment(B, F) → f
34. Segment(F, G) → g
35. Segment(H, E) → h
36. Segment(D, A) → c_1
37. Segment(C, B) → d_1
38. Segment(D, C) → e_1
39. Segment(H, G) → f_1
40. Segment(G, C) → g_1
41. Segment(D, H) → h_1
42. Polygon(A, B, C, D) → Vieleck1, a_2, b_2, c_2, d_2
43. Polygon(A', B', C', D') → Vieleck2, a', b', c', d'
44. Polygon(C, B, F, G) → Vieleck3, c_3, b_3, f_2, g_2
45. Polygon(C', B', F', G') → Vieleck4, c'_1, b'_1, f', g'
46. Polygon(C, D, H, G) → Vieleck5, c_4, d_3, h_2, g_3
47. Polygon(C', G', H', D') → Vieleck6, c'_2, g'_1, h', d'_1
48. Polygon(E, F, G, H) → Vieleck7, e_2, f_3, g_4, h_3
49. Polygon(E', F', G', H') → Vieleck8, e', f'_1, g'_2, h'_1
50. Polygon(A, B, F, E) → Vieleck9, a_3, b_4, f_4, e_3
51. Polygon(A', B', F', E') → Vieleck10, a'_1, b'_2, f'_2, e'_1
52. Polygon(A, D, H, E) → Vieleck11, a_4, d_4, h_4, e_4
53. Polygon(A', D', H', E') → Vieleck12, a'_2, d'_2, h'_2, e'_2