圆内接四边形对角 by James Monaghan

GeoGebra 命令及参数

1. Polygon(E_1, H_1, G_1, F_1) → poly1, e_2, h_2, g_2, f_2
2. Angle(G_1, F_1, E_1) → λ
3. Angle(E_1, H_1, G_1) → ξ
4. Angle(F_1, E_1, H_1) → ο
5. Angle(H_1, G_1, F_1) → ρ
6. Circle(D_1, E_3) → e_1
7. Point(e_1) → F_3
8. Point(e_1) → G_3
9. Segment(F_3, G_3) → f_1
10. Point(e_1) → H_3
11. Segment(G_3, H_3) → g_1
12. Segment(H_3, E_3) → h_1
13. Segment(E_3, F_3) → i_1
14. Angle(F_3, G_3, H_3) → γ_2
15. Angle(F_3, E_3, H_3) → δ_2
16. Angle(G_3, F_3, E_3) → ε_2
17. Angle(G_3, H_3, E_3) → ζ_2
18. Ray(G_3, H_3) → j_3
19. Point(j_3) → I_4
20. Point(j_3) → I_1
21. Segment(G_3, I_1) → j_1