梯形几何演示

GeoGebra 命令及参数

1. Line(A, B) → a
2. Line(C, a) → b
3. Point(b) → D
4. Polygon(A, C, D, B) → poly1, a_1, c, d, b_1
5. Segment(A, D) → e
6. Segment(C, B) → f
7. Intersect(e, f) → E
8. Angle(B, C, D) → α
9. Angle(C, B, A) → β
10. Angle(C, D, A) → γ
11. Angle(B, A, D) → δ
12. Angle(E, A, C) → ε
13. Angle(A, C, E) → ζ
14. Angle(B, E, D) → η
15. Distance(A, E) → distanceAE
16. Distance(E, D) → distanceED
17. Distance(C, E) → distanceCE
18. Distance(B, E) → distanceBE