探索平行四边形 by Jay Lietzow

GeoGebra 命令及参数

1. Line(A, B) → a
2. Distance(A, B) → distanceAB
3. Midpoint(A, B) →
4. Line(A, C) → e
5. Line(C, a) → b
6. Line(B, D) → f
7. Polygon(A, C, D, B) → poly1, a_1, c, d, b_1
8. Midpoint(A, B) →
9. Midpoint(C, D) →
10. Midpoint(A, C) →
11. Midpoint(B, D) →
12. Angle(C, A, B) → α
13. Angle(A, B, D) → β
14. Angle(B, D, C) → γ
15. Angle(D, C, A) → δ
16. Midpoint(A, B) →
17. Midpoint(B, D) →
18. Midpoint(C, D) →
19. Midpoint(A, C) →