梯形的对角线 by Gail Kliewer

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Segment(A, C) → b
3. Line(C, a) → c
4. Point(c) → D
5. Segment(D, B) → d
6. Segment(C, D) → e
7. Segment(C, B) → f
8. Segment(D, A) → g
9. Intersect(f, g) → E
10. Distance(D, E) → distanceDE
11. Distance(E, A) → distanceEA
12. Distance(C, E) → distanceCE
13. Distance(E, B) → distanceEB
14. Segment(F, G) → h
15. Segment(F, H) → i
16. Line(H, h) → j
17. Point(j) → I
18. Segment(H, I) → k
19. Segment(I, G) → l
20. Segment(G, H) → m
21. Segment(I, F) → n
22. Intersect(m, n) → J
23. Angle(I, J, H) → α
24. Angle(H, J, F) → β
25. Angle(F, J, G) → γ
26. Angle(G, J, I) → δ