梯形与筝形探究

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Line(C, f) → g
3. Segment(C, A) → h
4. Point(g) → D
5. Segment(B, D) → i
6. Segment(C, D) → j
7. Segment(E, F) → k
8. Line(G, k) → l
9. Segment(G, E) → m
10. LineBisector(E, F) → n
11. Mirror(G, n) → G'
12. Segment(F, G') → p
13. Segment(G', G) → q
14. Segment(G, G') → r
15. Distance(C, A) → distanceCA
16. Distance(B, D) → distanceBD
17. Distance(F, G') → distanceFG'
18. Distance(G, E) → distanceGE
19. Segment(H, I) → s
20. Circle(I, H) → c
21. Point(c) → J
22. Segment(I, J) → t
23. Circle(H, J) → d
24. Circle(J, H) → e
25. Intersect(d, e, 1) → K
26. Segment(K, H) → f_1
27. Segment(J, K) → g_1
28. Angle(E, G, G') → α
29. Angle(F, G', G) → β
30. Distance(I, H) → distanceIH
31. Distance(J, I) → distanceJI
32. Distance(J, K) → distanceJK
33. Distance(K, H) → distanceKH
34. Angle(I, H, K) → γ
35. Angle(I, J, K) → δ
36. Segment(A, B) → a
37. Segment(B, D) → h_1
38. Segment(D, C) → i_1
39. Segment(C, A) → j_1
40. Angle(A, C, D) → ε
41. Angle(B, D, C) → ζ
42. Angle(C, A, B) → η
43. Angle(D, B, A) → θ
44. Angle(G, E, F) → ι
45. Angle(G', F, E) → κ