三角形的垂心、外心和重心

GeoGebra 命令及参数

1. Segment(B, A) → f
2. Segment(A, C) → g
3. Segment(C, B) → h
4. Line(B, A) → i
5. Line(A, C) → j
6. Line(B, C) → k
7. Midpoint(A, B) → D
8. Midpoint(A, C) → E
9. Midpoint(C, B) → F
10. Segment(D, E) → l
11. Segment(E, F) → m
12. Segment(F, D) → n
13. Line(D, E) → p
14. Line(D, F) → q
15. Line(F, E) → r
16. LineBisector(A, B) → s
17. LineBisector(A, C) → t
18. LineBisector(C, B) → a
19. Intersect(s, t) → G
20. OrthogonalLine(C, f) → b
21. OrthogonalLine(A, k) → c
22. OrthogonalLine(B, j) → d
23. Intersect(b, c) → H
24. Segment(B, E) → e
25. Segment(C, D) → f_1
26. Segment(A, F) → g_1
27. Intersect(e, f_1) → I