在四边形内绘制椭圆

GeoGebra 命令及参数

1. Polygon(D, B, P) → poly2, p_1, d_2, b_2
2. PointIn(poly2) → MM
3. Polygon(A, B, C, D) → poly1, a, b, c, d
4. Ray(A, B) → e
5. Ray(D, C) → f
6. Ray(B, C) → g
7. Ray(A, D) → h
8. Intersect(b, g) → W
9. Intersect(g, h) → E
10. Intersect(e, f) → F
11. Point(d) → G
12. Segment(E, F) → i
13. Ray(A, C) → j
14. Intersect(i, j) → H
15. Segment(D, B) → k
16. Intersect(j, k) → I
17. Ray(G, I) → l
18. Intersect(b, g) → J
19. Intersect(l, b) → K
20. Ray(H, K) → m
21. Line(A, i) → p
22. Intersect(a, e) → L
23. Intersect(m, a) → M
24. Intersect(p, m) → N
25. Ray(H, B) → n
26. Intersect(p, n) → O
27. Semicircle(O, A) → q
28. OrthogonalLine(N, p) → r
29. Intersect(q, r) → Q,
30. CircleSector(A, Q, O) → s
31. Intersect(s, p) → R,
32. Segment(R, H) → t
33. Intersect(k, t) → S
34. Ray(G, H) → a_1
35. Intersect(c, f) → T
36. Intersect(a_1, c) → U
37. Conic(U, K, M, G, S) → c_1
38. Segment(G, K) → b_1
39. Segment(N, Q) → d_1