你旋转得有多快？——纬度圈上的线速度动态模型

GeoGebra 命令及参数

1. Point(c) → A
2. Point(c) → B
3. Point(c) → C
4. Point(c) → D
5. Line(B, D) → h
6. Line(C, A) → b
7. Mirror(O, b) → E'
8. Mirror(O, b) → E'_1
9. Mirror(O, b) → E'_2
10. Mirror(R, b) → R'
11. Line(O, A) → n
12. Line(O, B) → q
13. Point(n) → S
14. Segment(O, A) → r
15. Rotate(A, Latitude, O) → A'
16. Angle(A, O, A') → θ
17. Segment(O, A') → s
18. CircleArc(O, A, A') → d
19. OrthogonalLine(A', q) → a
20. Intersect(q, a) → E
21. Segment(E, A') → e
22. Segment(E, O) → f
23. Angle(O, E, A') → α
24. Mirror(A', q) → A''
25. Mirror(A', n) → A''_1
26. Mirror(A''_1, q) → F
27. Point(e) → G
28. Mirror(G, q) → G'
29. Ellipse(G', G, A') → g
30. Intersect(g, q) → H, I
31. Point(g) → J
32. Segment(E, A') → i
33. LineBisector(i) → j
34. Intersect(a, j) → K
35. Vector(R, K) → u
36. Mirror(E, n) → E'_3
37. Mirror(A', n) → A''_2
38. Segment(E'_3, A''_2) → i'
39. Mirror(g, n) → g'
40. Mirror(O, n) → O'
41. Mirror(A', n) → A''_3
42. Segment(O', A''_3) → s'
43. OrthogonalLine(J, n) → l
44. Point(g') → L
45. Point(k) → N
46. Midpoint(i') → Q
47. Vector(R', Q) → v
48. Mirror(E, n) → E'_4
49. Mirror(O, n) → O'_1
50. Segment(E'_4, O'_1) → f'
51. Angle(A''_1, E'_3, O) → β
52. Mirror(d, n) → d'
53. Angle(s', r) → γ
54. Angle(B, O, C) → δ
55. Angle(C, O, D) → ε
56. Segment(C, A) → a_1
57. Segment(E, B) → b_1
58. Segment(E'_3, D) → c_1
59. Textfield(Latitude) → inputBox1