立体/平面图形重心与向量法构造（7）

GeoGebra 命令及参数

1. Midpoint(D, P) → R
2. Line(P, O) → j_1
3. Midpoint(O, B) → S
4. Midpoint(N, D) → Q
5. Line(Q, R) → i_1
6. Intersect(i_1, j_1) → W
7. Line(M, N) → t
8. Intersect(t, i_1) → V
9. Midpoint(B, M) → T
10. Line(S, T) → k_1
11. Intersect(j_1, k_1) → Z
12. Segment(V, Z) → m_1
13. Intersect(t, k_1) → U
14. Segment(U, W) → l_1
15. Polygon(A, B, C, D) → poly1, a, b, c, d
16. Polygon(A, C, B) → poly2, b_1, a_1, c_1
17. Polygon(A, D, C) → poly3, c_2, a_2, d_1
18. Midpoint(a) → E
19. Midpoint(b) → F
20. Segment(A, F) → e
21. Segment(C, E) → f
22. Intersect(e, f) → G_6
23. Midpoint(d) → G_5
24. Midpoint(c) → H
25. Segment(A, H) → g
26. Segment(C, G_5) → h
27. Intersect(g, h) → G_3
28. Segment(G_6, G_3) → i
29. Polygon(E, G_5, H, F) → poly4, e_1, g_1, h_1, f_1
30. Segment(E, H) → j
31. Segment(G_5, F) → k
32. Intersect(j, k) → I
33. Segment(B, D) → l
34. Segment(B, G_5) → m
35. Segment(D, E) → n
36. Segment(D, F) → p
37. Segment(B, H) → q
38. Intersect(n, m) → G_1
39. Intersect(p, q) → G_2
40. Segment(G_1, G_2) → r
41. Intersect(m_1, l_1) → G
42. Polygon(U, V, W, Z) → poly5, u, v, w, z
43. Polygon(A, B, D) → poly6, d_2, a_3, b_2
44. Polygon(D, C, B) → poly7, b_3, d_3, c_3
45. Segment(G_1, G) → s
46. Segment(G, G_2) → n_1
47. Distance(G_1, G) → distanciaG3G
48. Distance(G, G_2) → distanciaGG4
49. Circle(G_1, (o * poly6 / 25)) → c1
50. Circle(G_2, (o * poly7 / 25)) → d1