角度与余角演示

GeoGebra 命令及参数

1. Point(yAxis) → A
2. Point(xAxis) → B
3. Circle(A, B) → c
4. Point(c) → C
5. Vector(A, B) → u
6. Vector(A, C) → v
7. CircleArc(A, B, C) → d
8. Angle(B, A, C) → α
9. Point(c) → D
10. Vector(A, D) → w
11. Angle(D, A, B) → β
12. CircleArc(A, D, B) → e
13. Rotate(B, -(β / 2), A) → B'
14. Angle(B', A, B) → γ
15. Point(A, Vector[A, B'] / 2.8) → M
16. Point(A, Vector[A, B'] / 0.9) → N
17. Vector(A, P) → z
18. CurveCartesian(r1 / h * (t + 6 * π) * cos(t + 6 * π), r1 / h * (t + 6 * π) * sin(t + 6 * π), t, 0, θ) → f
19. CurveCartesian(r1 / h * (t + 6 * π) * cos(t + 6 * π), (-r1) / h * (t + 6 * π) * sin(t + 6 * π), t, 0, θn) → g
20. Vector(A, Q) → i