梯形性质探索 by Rosalie83

GeoGebra 命令及参数

1. Point(yAxis) → A
2. Line(A, xAxis) → a
3. Point(yAxis) → B
4. Line(B, a) → b
5. Point(a) → C
6. Point(a) → D
7. Point(b) → E
8. Polygon(B, C, D, E) → poly1, b_1, c, d, e
9. Angle(B, C, D) → α
10. Angle(C, D, E) → β
11. Angle(D, E, B) → γ
12. Angle(E, B, C) → δ
13. Segment(B, D) → h
14. Segment(C, E) → i
15. Intersect(h, i) → F
16. Segment(B, F) → k
17. Segment(F, D) → l
18. Segment(C, F) → m
19. Segment(F, E) → n
20. Angle(B, F, E) → ε
21. Angle(E, F, D) → ζ
22. Angle(D, F, C) → η
23. Angle(C, F, B) → θ
24. Angle(F, B, C) → ι
25. Angle(B, C, F) → κ
26. Angle(F, C, D) → λ
27. Angle(C, D, F) → μ
28. Angle(F, D, E) → ν
29. Angle(D, E, F) → ξ
30. Angle(F, E, B) → ο
31. Angle(E, B, F) → ρ