正弦比概念演示

GeoGebra 命令及参数

1. Point(xAxis) → X
2. Rotate(X, θ, O) → B'
3. Ray(O, B') → f
4. Point(f) → A
5. Angle(X, O, B') → α
6. Ray(O, X) → g
7. Point(f) → A_1
8. Point(f) → A_2
9. Point(f) → A_3
10. Segment(O, A_1) → h_1
11. Segment(O, A_2) → h_2
12. Segment(O, A_3) → h_3
13. Segment(A_1, B_1) → o_1
14. Segment(A_2, B_2) → o_2
15. Polygon(O, A, B) → p_1, i, j, k
16. Segment(A_3, B_3) → o_3
17. Angle(A_1, B_1, O) → β_1
18. Angle(A_2, B_2, O) → β_2
19. Angle(A_3, B_3, O) → β_3
20. Segment(A, B) → o
21. Angle(A, B, O) → ε
22. Segment(O, A) → h
23. Segment(O, B) → a
24. Midpoint(o_1) → M_1
25. Midpoint(o_2) → M_2
26. Midpoint(o_3) → M_3
27. Segment(O, B_1) → a_1
28. Segment(O, B_2) → a_2
29. Segment(O, B_3) → a_3
30. Corner(1, 1) → C
31. Midpoint(o) → M