不同方向的椭圆

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(xAxis) → B
3. Circle(A, B) → c
4. Point(xAxis) → C
5. Circle(A, C) → d
6. Rotate(C, α, A) → C'
7. Rotate(B, (-α), A) → B'
8. Midpoint(C', B') → D
9. Radius(c) → b
10. Radius(d) → e
11. Intersect(d, xAxis, 2) → G
12. Circle(F1, r) → k
13. Circle(F2, (2 * f) - r) → p
14. Intersect(p, k) → H, I, ,
15. Segment(C', B') → i
16. Segment(F1, I) → j
17. Segment(I, F2) → l
18. Segment(F1, H) → m
19. Segment(H, F2) → n