费马-Dao-Nhi三角形推广的GeoGebra演示

GeoGebra 命令及参数

1. Polygon(A, B, 3) → poly1, f, g, h, C
2. Polygon(B, D, 3) → poly2, i, j, k, E
3. Polygon(D, A, 3) → poly3, l, m, n, B_f
4. Centroid(poly1) → I
5. Centroid(poly3) → J
6. Centroid(poly2) → K
7. Polygon(K, I, J) → t2, j_1, k_1, i_1
8. Centroid(t2) → M
9. Mirror(B, F) → B'
10. Mirror(A, F) → A'
11. Mirror(D, F) → D'
12. Midpoint(B', B_f) → G
13. Midpoint(A', E) → H
14. Midpoint(D', C) → L
15. Polygon(H, L, G) → t1, g_1, h_1, l_1
16. Segment(B, F) → p
17. Segment(F, B') → q
18. Segment(B', G) → r
19. Segment(G, B_f) → s
20. Segment(A, F) → t
21. Segment(F, A') → a
22. Segment(A', H) → b
23. Segment(H, E) → c
24. Segment(D, F) → d
25. Segment(F, D') → e
26. Segment(D', L) → f_1
27. Segment(L, C) → m_1
28. Line(I, L) → n_1
29. Line(K, H) → p_1
30. Line(G, J) → q_1
31. Intersect(n_1, p_1) → N
32. Segment(F, M) → r_1
33. Segment(M, N) → s_1