双曲线反射性质演示 by Brian Sterr

GeoGebra 命令及参数

1. Segment(E, D) → j
2. Point(j) → A
3. Ray(F_1, A) → e
4. Intersect(d, e, 1) → G
5. Intersect(d, e, 2) → P
6. Ray(F_2, P) → h
7. Point(h) → C
8. Ray(P, C) → i
9. Tangent(P, d) → g,
10. Segment(P, F_2) → m
11. Point(g) → B
12. Point(g) → F
13. If(Angle[A, P, F] < π / 2, Angle[A, P, F], Angle[B, P, A]) → β
14. If(Angle[B, P, C] < π / 2, Angle[B, P, C], Angle[C, P, F]) → α
15. Segment(G, P) → f
16. Segment(G, F_1) → q
17. Point(f) → H
18. Segment(P, Intersect[Circle[P, G], i]) → n
19. Point(n) → I
20. Point(f) → J
21. Point(n) → K