筝形中的形状

GeoGebra 命令及参数

1. Segment(A, D) → a
2. Segment(D, C) → b
3. Segment(C, B) → c
4. Segment(A, B) → d
5. Angle(B, A, D) → α
6. Angle(A, D, C) → β
7. Angle(D, C, B) → γ
8. Angle(C, B, A) → δ
9. Midpoint(A, D) → E
10. Midpoint(D, C) → F
11. Midpoint(C, B) → G
12. Midpoint(B, A) → H
13. Segment(E, F) → e
14. Segment(F, G) → f
15. Segment(G, H) → g
16. Segment(H, E) → h
17. Angle(H, E, F) → ε
18. Angle(E, F, G) → ζ
19. Angle(F, G, H) → η
20. Angle(G, H, E) → θ