拿破仑三角形（Triángulos de Napoleón）动态几何演示

GeoGebra 命令及参数

1. Circle(I, J) → f
2. Point(f, g) → C
3. If(ext, Polygon[C, B, 3], Polygon[B, C, 3]) → polígono1
4. Polygon(A, B, C) → t1, c, a, b
5. If(ext, Polygon[A, C, 3], Polygon[C, A, 3]) → polígono2
6. If(ext, Polygon[B, A, 3], Polygon[A, B, 3]) → polígono3
7. Centroid(polígono1) → D
8. Centroid(polígono2) → E
9. Centroid(polígono3) → F
10. Polygon(D, E, F) → t2, i_1, g_1, h_1
11. Vector(G, D) → u
12. Vector(G, E) → v
13. Vector(G, F) → w
14. Midpoint(a) → H
15. Vector(H, D) → d
16. Angle(B, H, D) → ω
17. Angle(E, G, F) → α
18. Angle(D, G, F) → β
19. Vector(C, B) → e
20. Vector(A, C) → p
21. Vector(B, A) → q
22. Angle(D, G, E) → γ
23. Angle(D, G, E) → γ'
24. Angle(E, G, F) → α'
25. Angle(D, G, F) → β'
26. If(ext, "+", "-") → s