等腰梯形

GeoGebra 命令及参数

1. Segment(B, A) → f
2. Midpoint(B, A) → M
3. OrthogonalLine(M, f) → h
4. Point(h) → O
5. Line(O, f) → g
6. OrthogonalLine(B, f) → i
7. Intersect(g, i) → F
8. Segment(O, F) → j
9. Point(j) → C
10. Segment(B, C) → k
11. Mirror(C, h) → D
12. Segment(C, D) → l
13. Segment(D, A) → m
14. Line(D, k) → n
15. Intersect(n, f) → E
16. Segment(D, E) → p
17. Angle(A, B, C) → β
18. Angle(D, A, B) → α
19. Midpoint(B, C) → N
20. Midpoint(A, D) → P
21. Angle(B, C, D) → γ
22. Angle(C, D, A) → δ
23. Distance(A, D) → distanceAD
24. Distance(B, C) → distanceBC
25. Distance(C, D) → distanceCD
26. Distance(A, B) → distanceAB
27. Segment(B, D) → q
28. Segment(A, C) → r
29. Intersect(q, r) → X
30. Distance(A, C) → distanceAC
31. Distance(B, D) → distanceBD
32. Point(l) → G
33. OrthogonalLine(G, l) → f_1
34. Intersect(f_1, f) → H
35. Angle(A, H, G) → ε
36. Segment(G, H) → g_1
37. Segment(N, P) → h_1
38. Distance(G, H) → distanceGH
39. OrthogonalLine(N, k) → i_1
40. OrthogonalLine(P, m) → j_1
41. Intersect(h, i_1) → Y
42. Circle(Y, B) → c_1
43. Segment(N, P) → k_1