圆锥曲线的反射性质 by Steve Phelps

GeoGebra 命令及参数

1. Mirror(A, yAxis) → A'
2. Ellipse(A', A, B) → c
3. Tangent(B, c) → a,
4. Circle(B, 2) → d
5. Intersect(d, a) → C, D
6. Vector(B, D) → u
7. Vector(B, C) → v
8. OrthogonalLine(B, a) → b
9. Intersect(c, b) → E, F
10. Angle(A', B, F) → α
11. Angle(F, B, A) → β
12. Vector(A', B) → w
13. Vector(B, A) → e
14. Angle(A, B, F) → γ
15. Angle(F, B, A') → δ