垂心在三角形边上的反射

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. OrthogonalLine(A, a) → f
3. OrthogonalLine(B, b) → g
4. OrthogonalLine(C, c) → h
5. Intersect(f, g) → H
6. Intersect(h, c) → F
7. Intersect(f, a) → D
8. Intersect(g, b) → E
9. Segment(H, F) → i
10. Segment(H, D) → j
11. Segment(H, E) → k
12. Circle(B, A, C) → d
13. Rotate(H, (n * π), F) → H'
14. Rotate(F, (n * π), F) → F'
15. Segment(H', F') → i'
16. Rotate(H, (n * π), D) → H'_{1}
17. Rotate(D, (n * π), D) → D'
18. Segment(H'_{1}, D') → j'
19. Rotate(H, (n * π), E) → H'_{2}
20. Rotate(E, (n * π), E) → E'
21. Segment(H'_{2}, E') → k'
22. Angle(f, a) → α
23. Angle(g, b) → β
24. Angle(h, c) → γ
25. Line(A, B) → l
26. Line(B, C) → m
27. Line(C, A) → p
28. Center(d) → O