圆锥曲线与概率统计综合演示

GeoGebra 命令及参数

1. Dilate(A, If[0 < a ≤ 1, 1 - a, 0], D) → A'
2. Vector(A, A') → u
3. Dilate(D, If[1 < a ≤ 2, 2 - a, 0], B) → D'
4. Vector(D, D') → v
5. Line(A, B) → f
6. Point(f) → F
7. Angle(D, A, F) → α
8. Point(eq1) → G
9. Angle(G, A, F) → β
10. Rotate(H, If[0 ≤ b ≤ 1, (b * β), β], B) → H'
11. Dilate(B, If[1 < b ≤ 2, 2 - b, 0], A) → E'
12. Vector(B, E') → w
13. Translate(H', w) → H''
14. Angle(B, D, A) → γ
15. Polygon(A, D, B) → t1, b_1, a_1, d