三角函数比值演示：比较对边与斜边的比值

GeoGebra 命令及参数

1. Line(A, C) → a
2. OrthogonalLine(C, a) → b
3. Point(b) → B
4. Polygon(A, C, B) → poly1, c, a_1, b_1
5. Point(b_1) → D
6. Line(D, a_1) → d
7. Intersect(d, c) → E
8. Segment(E, D) → e
9. Distance(A, E) → distanceAE
10. Distance(A, C) → distanceAC
11. Distance(E, D) → distanceED
12. Distance(C, B) → distanceCB
13. Angle(B, C, A) → α
14. Angle(D, E, A) → β
15. Distance(A, D) → distanceAD
16. Distance(A, B) → distanceAB
17. Angle(E, A, D) → γ
18. Angle(A, D, E) → δ
19. Angle(A, B, C) → ε