三角形内心 by canhalt_1

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. AngularBisector(B, A, C) → d
3. AngularBisector(A, C, B) → e
4. AngularBisector(C, B, A) → f
5. Intersect(f, e) → Incenter
6. Intersect(c, e) → D
7. Intersect(a, d) → E
8. Intersect(b, f) → F
9. Angle(D, C, B) → α
10. Angle(A, C, D) → β
11. Angle(C, B, F) → γ
12. Angle(F, B, A) → δ
13. Angle(B, A, E) → ε
14. Angle(E, A, C) → ζ
15. Ray(A, E) → g
16. Ray(C, D) → h
17. Ray(B, F) → i
18. OrthogonalLine(Incenter, c) → j
19. Intersect(j, c) → G
20. Circle(Incenter, G) → k
21. Segment(G, Incenter) → l
22. Angle(B, G, Incenter) → η