垂直角探索 (1)

GeoGebra 命令及参数

1. Point(y = 0) → A
2. Line(A, B) → f
3. Rotate(B, α, A) → B'
4. Angle(B, A, B') → γ
5. Line(A, B') → g
6. Rotate(B', β, A) → B''
7. Angle(B', A, B'') → δ
8. Line(A, B'') → h
9. Circle(A, a) → c
10. Intersect(c, h, 2) → C
11. Circle(C, A) → d
12. Circle(A, C) → e
13. Intersect(e, h, 2) → J
14. Segment(A, C) → j
15. Circle(A, (0.3 * j)) → k
16. Circle(C, (0.3 * j)) → p
17. Intersect(p, h) → N, O
18. Intersect(k, h) → P, Q
19. Intersect(k, g) → T, U
20. CircleSector(A, U, Q) → q
21. Circle(C, j / 2) → g_1
22. Circle(A, j / 2) → h_1
23. Intersect(g_1, h, 2) → H
24. Intersect(g_1, h) → I, Z
25. Intersect(h_1, h) → A_1, B_1
26. Intersect(h_1, g) → E_1, F_1
27. Ray(A, A_1) → m
28. Ray(C, H) → n
29. CircleArc(C, N, O) → r
30. Segment(A, C) → b
31. CircleArc(A, T, U) → s
32. Point(s) → D
33. Rotate(D, β, A) → D'
34. Angle(D, A, D') → ε
35. CircleSector(A, D, D') → t
36. Line(P, Q) → i