费马点与托里拆利点

GeoGebra 命令及参数

1. Polygon(A, C, B) → t1, c, a, b
2. Angle(C, B, A) → α
3. Angle(B, A, C) → β
4. Angle(A, C, B) → γ
5. Polygon(C, B, 3) → poly1, f, g, h, D
6. Polygon(A, C, 3) → poly2, i, j, k, E
7. Segment(E, B) → c_{2}
8. Segment(D, A) → a_{2}
9. Polygon(B, A, 3) → poly3, n, p, q, F_{1}
10. Segment(F_{1}, C) → b_{2}
11. Intersect(c_{2}, a_{2}) → G
12. Intersect(c_{2}, b_{2}) → H
13. Intersect(a_{2}, c_{2}) → I
14. Intersect(b_{2}, a_{2}) → F
15. Segment(A, F) → l
16. Segment(C, F) → m
17. Segment(B, F) → r
18. Angle(B, F, C) → δ
19. Angle(C, F, A) → ε
20. Angle(A, F, B) → ζ
21. Polygon(A, G, B) → t2, b_1, a_1, g_1
22. Polygon(G, B, C) → t3, c_1, g_2, b_3
23. Polygon(G, C, A) → t4, a_3, g_3, c_3
24. Segment(F, C) → s
25. Segment(F, A) → t
26. Segment(B, F) → f_1
27. Segment(F, C) → h_1
28. Segment(A, F) → i_1
29. Point(i_1) → J
30. Segment(B, J) → j_1