单位圆的切线图

GeoGebra 命令及参数

1. Point(xAxis) → A
2. Circle(A, 1) → c
3. Intersect(c, xAxis, 2) → B
4. Rotate(B, α, A) → P
5. Angle(B, A, P) → β
6. Segment(A, P) → a
7. OrthogonalLine(P, xAxis) → b
8. Tangent(B, c) → d,
9. Line(A, P) → e
10. Intersect(e, d) → D
11. Segment(B, D) → h
12. Ray(H, U) → q
13. Ray(I, V) → r
14. Segment(J, K) → s
15. Segment(K, O) → t
16. Segment(K, Q) → a_1
17. Segment(M, A_1) → b_1
18. Segment(M, B_1) → c_1
19. Segment(J, C_1) → d_1
20. Segment(J, D_1) → e_1
21. Segment(L, N) → f_1
22. Segment(L, E) → g_1
23. Segment(M, M') → h_1
24. Line(V, U) → l
25. Line(X, W) → m
26. Line(Z, Y) → n
27. Line(G, F) → p