三角形的特殊点 by Zoltán Kovács

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. OrthogonalLine(A, a) → h_A
3. OrthogonalLine(B, b) → h_B
4. OrthogonalLine(C, c) → h_C
5. Intersect(h_A, h_B) → H
6. Midpoint(a) → D
7. Midpoint(b) → E
8. Midpoint(c) → F
9. Segment(A, D) → e
10. Segment(B, E) → f_1
11. Segment(C, F) → g
12. Intersect(e, f_1) → S
13. LineBisector(a) → h
14. LineBisector(b) → i
15. LineBisector(c) → j
16. Intersect(i, h) → U
17. Line(S, H) → l
18. Midpoint(A, H) → A'
19. Midpoint(B, H) → B'
20. Midpoint(H, C) → C'
21. Intersect(h_A, a) → F_A
22. Intersect(h_B, b) → F_B
23. Intersect(h_C, c) → F_C
24. Circle(A', F, F_C) → k_F