平行四边形的性质（第二部分）

GeoGebra 命令及参数

1. Line(A, B) → a
2. Line(C, a) → b
3. Line(A, C) → c
4. Line(B, c) → d
5. Intersect(b, d) → D
6. Polygon(A, B, D, C) → poly1, a_1, b_1, d_1, c_1
7. Angle(A, B, D) → α
8. Angle(B, D, C) → β
9. Angle(C, A, B) → γ
10. Angle(A, C, D) → δ
11. Angle(A, D, C) → ε
12. Angle(A, D, C) → ζ
13. Angle(D, C, A) → η
14. Distance(d_1, c_1) → e
15. Distance(b_1, a_1) → f
16. Segment(D, A) → g
17. Segment(C, B) → h
18. Intersect(g, h) → F
19. Distance(A, F) → distanceAF
20. Distance(F, B) → distanceFB
21. Distance(F, D) → distanceFD
22. Distance(F, C) → distanceFC