三角函数比值探索

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Circle(A, n) → c_1
3. Intersect(c_1, xAxis, 2) → B_1
4. Point(c_1) → C_1
5. CircleArc(A, B_1, C_1) → d
6. Segment(A, B) → c
7. Segment(A, C) → b
8. Segment(B, C) → a
9. Angle(C, A, B) → β
10. Angle(A, B, C) → γ
11. Angle(B, C, A) → δ
12. Polygon(D, E, F) → poly1, f_1, d_1, e_1
13. Angle(F, D, E) → ε
14. Angle(D, E, F) → ζ
15. Angle(E, F, D) → η