镜子中的女孩

GeoGebra 命令及参数

1. Point(yAxis) → F
2. Intersect(xAxis, yAxis) → B_2
3. Segment(B_2, F) → b
4. Intersect(b, g) → A
5. OrthogonalLine(L, b) → i
6. Intersect(b, i) → B
7. OrthogonalLine(C, b) → e
8. Point(e) → I
9. Point(e) → J
10. Segment(J, I) → h
11. Point(h) → H
12. Intersect(c, i) → M
13. Line(B_1, B_2) → d
14. OrthogonalLine(B_1, d) → f
15. Mirror(pic1, b) → pic2
16. Mirror(H, b) → D
17. OrthogonalLine(E, b) → a
18. Intersect(a, c) → G
19. Intersect(g, c) → K
20. Mirror(M, b) → N
21. Mirror(K, b) → O
22. Segment(G, O) → j
23. Segment(G, N) → k
24. Intersect(b, j) → A'
25. Intersect(b, k) → B'
26. Angle(B', G, A') → α
27. Segment(A', B') → l
28. Segment(G, B') → p
29. Segment(B', M) → q
30. OrthogonalLine(B', b) → r
31. Point(r) → P
32. Angle(M, B', B) → β
33. Angle(A', B', G) → γ
34. Intersect(j, b) → Q
35. Segment(G, Q) → a1
36. Segment(K, Q) → b1
37. OrthogonalLine(G, b) → c1
38. Intersect(g, j) → R
39. OrthogonalLine(R, c1) → d1
40. Point(b) → U
41. Intersect(b, d) → V
42. Polygon(U, S, T, V) → poly1, u_1, s_1, t_1, v_1