探索三角形垂心

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(B, C) → g
3. Segment(C, A) → h
4. OrthogonalLine(A, g) → i
5. OrthogonalLine(B, h) → j
6. OrthogonalLine(C, f) → k
7. Intersect(k, f) → D
8. Intersect(i, g) → E
9. Intersect(j, h) → F
10. Intersect(i, j) → G
11. Angle(C, D, A) → α
12. Angle(G, E, B) → β
13. Angle(C, F, G) → γ
14. Segment(D, F) → l
15. Segment(F, E) → m
16. Segment(E, D) → n
17. Point(f) → H
18. Point(g) → I
19. Point(h) → J
20. Segment(H, I) → p
21. Segment(I, J) → q
22. Segment(J, H) → r
23. AngularBisector(F, D, E) → s
24. AngularBisector(D, E, F) → t
25. AngularBisector(E, F, D) → e
26. Angle(E, F, G) → δ
27. Angle(G, F, D) → ε
28. Angle(F, D, G) → ζ
29. Angle(G, D, E) → η
30. Angle(D, E, G) → θ
31. Angle(G, E, F) → ι
32. OrthogonalLine(G, n) → f_1
33. OrthogonalLine(G, l) → g_1
34. OrthogonalLine(G, m) → h_1
35. Intersect(g_1, l) → K
36. Intersect(f_1, n) → L
37. Intersect(h_1, m) → M
38. Segment(G, M) → i_1
39. Segment(G, K) → j_1
40. Segment(G, L) → k_1
41. Circle(G, L) → c_1