三角形的内心、外心、重心和垂心互动演示

GeoGebra 命令及参数

1. Polygon(A, C, B) → Triangle, b, a, c
2. AngularBisector(C, B, A) → d
3. AngularBisector(C, A, B) → e
4. AngularBisector(A, C, B) → f
5. Intersect(d, e) → Incenter
6. OrthogonalLine(C, c) → g
7. OrthogonalLine(A, a) → h
8. OrthogonalLine(B, b) → i
9. Intersect(g, h) → Orthocenter
10. Midpoint(b) → D
11. Midpoint(c) → E
12. Midpoint(a) → F
13. Line(A, F) → j
14. Line(D, B) → k
15. Line(E, C) → l
16. Intersect(j, k) → Centroid
17. LineBisector(c) → m
18. LineBisector(b) → n
19. LineBisector(a) → p
20. Intersect(m, n) → Circumcenter
21. Circle(Circumcenter, C) → Circumcircle
22. OrthogonalLine(Incenter, c) → s
23. OrthogonalLine(Incenter, b) → t
24. OrthogonalLine(Incenter, a) → a_1
25. Intersect(a_1, a) → G
26. Intersect(s, c) → H
27. Intersect(t, b) → I
28. Circle(Incenter, H) → Incircle
29. Circle(B, 0.3) → r
30. Circle(A, 0.3) → c_1
31. Circle(C, 0.3) → d_1