正三角形中的向量与施泰纳点关系可视化

GeoGebra 命令及参数

1. Line(A, D) → f
2. Line(D, C) → g
3. Line(D, B) → h
4. Angle(B, D, C) → α
5. Polygon(B, A, 3) → poly1, p, q, r, G
6. Polygon(C, B, 3) → poly2, s, t, a, H
7. Circle(B, H, C) → c
8. Circle(A, G, B) → d
9. Circle(D, o) → e
10. Intersect(e, f, 1) → E
11. Intersect(e, h, 1) → F
12. Intersect(e, g, 1) → I
13. Line(E, h) → i
14. Line(F, f) → j
15. Intersect(i, j) → J
16. Line(I, h) → k
17. Line(F, g) → l
18. Intersect(k, l) → K
19. Vector(D, J) → u
20. Vector(D, K) → v
21. Line(E, g) → m
22. Line(I, f) → n
23. Intersect(m, n) → L
24. Vector(D, L) → w
25. Vector(D, E) → b
26. Vector(D, I) → u_1
27. Vector(D, F) → v_1
28. Polygon(A, C, 3) → poly3, f_1, g_1, h_1, M
29. Circle(M, A, C) → c_1
30. Segment(D, A) → i_1
31. Segment(D, C) → j_1
32. Segment(D, B) → k_1
33. Circle(J, K, L) → d_1
34. LineBisector(L, K) → l_1
35. LineBisector(J, L) → m_1
36. Intersect(l_1, m_1) → N
37. Vector(D, N) → w_1