简单三角比

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → O
2. Circle(O, 1) → c
3. Point(c) → A
4. Segment(O, A) → a
5. Point(xAxis) → B
6. Point(xAxis) → C
7. Line(B, C) → b
8. Point(yAxis) → D
9. Point(yAxis) → E
10. Line(D, E) → d
11. Line(A, d) → e
12. Intersect(b, e) → F
13. Segment(O, F) → f
14. Segment(F, A) → g
15. Segment(F, O) → h
16. Angle(F, O, A) → θ_1
17. Intersect(c, xAxis, 2) → G
18. Angle(G, O, A) → θ