旋转与向量几何构造

GeoGebra 命令及参数

1. Polygon(E, F, G, H) → poly2, e, f, g, h
2. Polygon(I, K, L, M_2) → poly3, ı, k, l, m
3. Midpoint(A, D) → N_2
4. Midpoint(B, C) → O
5. Midpoint(D, C) → P
6. Midpoint(A, B) → Q
7. Midpoint(E, F) → R
8. Midpoint(G, H) → S
9. Midpoint(E, H) → T
10. Midpoint(F, G) → U
11. Midpoint(K, L) → V
12. Midpoint(I, M_2) → W
13. Midpoint(M_2, L) → A_1
14. Midpoint(I, K) → B_1
15. Segment(N_2, O) → i
16. Segment(Q, P) → j
17. Segment(R, S) → n
18. Segment(T, U) → p
19. Segment(W, V) → q
20. Segment(B_1, A_1) → r
21. Intersect(i, j) → C_1
22. Intersect(n, p) → D_1
23. Intersect(q, r) → E_1
24. Segment(K, L) → s
25. Segment(C_1, D_1) → t
26. Segment(E_1, D_1) → a_1
27. Segment(E_1, C_1) → b_1
28. Midpoint(C_1, D_1) → F_1
29. Midpoint(C_1, E_1) → G_1
30. Segment(D_1, G_1) → c_1
31. Segment(F_1, E_1) → d_1
32. Polygon(E_2, F_2, G_2, H_1) → poly2_1, e_1, f_1, g_1, h_1
33. Midpoint(E_2, F_2) → R_1
34. Midpoint(G_2, H_1) → S_1
35. Midpoint(E_2, H_1) → T_1
36. Midpoint(F_2, G_2) → U_1
37. Segment(R_1, S_1) → n_1
38. Segment(T_1, U_1) → p_1
39. Intersect(n_1, p_1) → D_2
40. Midpoint(C_1, E_1) → I_1
41. Midpoint(D_2, D_1) → J_1
42. Midpoint(D_1, E_1) → K_1
43. Midpoint(C_1, D_2) → L_1
44. Segment(I_1, J_1) → i_1
45. Segment(L_1, K_1) → j_1
46. Intersect(i_1, j_1) → M
47. Circle(M, N) → k_1
48. Point(k_1) → O_1
49. Segment(O_1, A) → l_1
50. Segment(O_1, D) → m_1
51. Segment(O_1, B) → q_1
52. Segment(O_1, C) → r_1
53. Segment(O_1, I) → s_1
54. Segment(O_1, M_2) → t_1
55. Segment(O_1, K) → a_2
56. Segment(O_1, L) → b_2
57. Segment(O_1, H_1) → c_2
58. Segment(O_1, E_2) → d_2
59. Segment(O_1, F_2) → e_2
60. Segment(O_1, G_2) → f_2
61. Segment(O_1, H) → g_2
62. Segment(O_1, E) → h_2
63. Segment(O_1, F) → i_2
64. Segment(O_1, G) → j_2
65. Polygon(D, C, B, A) → poly1, d, c, b, a