三角形的交点

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. LineBisector(b) → f
3. LineBisector(c) → Midtnormal
4. Intersect(f, Midtnormal) → D
5. Circle(D, C) → d
6. AngularBisector(B, A, C) → g
7. AngularBisector(C, B, A) → h
8. Intersect(g, h) → E
9. OrthogonalLine(E, c) → i
10. Intersect(i, c) → F
11. Circle(E, F) → e
12. Midpoint(b) → G
13. Midpoint(c) → H
14. Midpoint(a) → I
15. Segment(H, C) → j
16. Segment(G, B) → k
17. Segment(I, A) → l
18. Intersect(j, k) → S_3
19. OrthogonalLine(C, c) → m
20. OrthogonalLine(A, a) → n
21. OrthogonalLine(B, b) → p
22. Intersect(m, c) → J
23. Intersect(n, a) → K
24. Intersect(p, b) → L
25. Segment(C, J) → q
26. Segment(A, K) → r
27. Segment(B, L) → s
28. Intersect(m, n) → S_4
29. Angle(S_4, K, B) → β
30. Angle(S_4, L, C) → γ
31. Angle(C, J, A) → δ
32. LineBisector(a) → t
33. AngularBisector(A, C, B) → f_1
34. Angle(B, F, E) → α