三角形中心定位

GeoGebra 命令及参数

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