用圆弧逼近椭圆

GeoGebra 命令及参数

1. Circle(A, 2) → c
2. Circle(B, 2) → d
3. Segment(A, B) → f
4. Circle(A, B) → e
5. Circle(B, A) → g
6. Intersect(g, e) → C, D, ,
7. Line(D, A) → h
8. Line(D, B) → i
9. Intersect(c, h) → E, F
10. Intersect(d, i) → G, H
11. CircleArc(D, F, H) → k
12. Line(C, A) → j
13. Line(B, C) → l
14. Intersect(c, j) → I, J
15. Intersect(d, l) → K, L
16. CircleArc(C, K, J) → p
17. CircleArc(A, J, F) → q
18. CircleArc(B, H, K) → r
19. Tangent(F, q) → m,
20. Tangent(F, k) → n,
21. LineBisector(A, B) → s
22. Intersect(p, s) → M,
23. Intersect(k, s) → N,
24. Distance(M, N) → distanceMN
25. Line(A, B) → t
26. Intersect(q, t) → O,
27. Intersect(r, t) → P,
28. Distance(O, P) → distanceOP
29. Intersect(eq1, t) → R, S
30. Midpoint(R, S) → T
31. Midpoint(A, B) → U
32. Vector(T, U) → u
33. Translate(eq1, u) → eq1'
34. Vector(T, U) → v
35. Translate(eq1, v) → eq1'_1