等腰梯形的对角线

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(B, C) → g
3. Segment(D, A) → i
4. Segment(D, C) → h
5. Angle(D, A, B) → α
6. Angle(A, B, C) → β
7. Angle(B, C, D) → γ
8. Angle(C, D, A) → δ
9. Translate(C, Vector[(a * Vector[C, D])]) → C1
10. Translate(B, Vector[(a * Vector[C, D])]) → B1
11. Vector(C, D) → u
12. Vector(B, A) → v
13. Rotate(B1, (-((b * (180° - (2 * γ))))), C1) → B2
14. Segment(D, B) → l
15. Segment(A, C) → m
16. Translate(A, Vector[(a * Vector[C, D])]) → A1
17. Segment(A1, C1) → j
18. Intersect(m, l) → E
19. Rotate(A1, (-((b * Angle[B, E, A]))), C1) → A2
20. Segment(C1, A2) → k
21. Segment(D, B) → n