GeoGebra几何作图范例：椭圆与比例

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Circle(C, Segment[A, B]) → c
3. Point(c) → D
4. Segment(C, D) → g
5. Polygon(E, F, G) → t1, g_1, e, f_1
6. Circle(H, Segment[G, F]) → d
7. Point(d) → I
8. Segment(H, I) → h
9. Segment(J, K) → i
10. Segment(L, M) → j
11. Circle(M, Segment[L, M]) → k
12. Intersect(k, i, 2) → O
13. Intersect(k, i, 1) → N
14. Circle(N, L) → p
15. Circle(O, Segment[N, L]) → q
16. Intersect(p, q, 2) → P
17. Segment(L, P) → l
18. Line(Q, R) → m
19. Line(S, T) → n
20. Intersect(m, n) → U
21. Circle(V, Segment[U, S]) → r
22. Point(m) → W
23. Circle(S, Segment[U, S]) → s
24. Intersect(r, s, 2) → Z
25. Segment(Z, W) → t
26. Segment(A_1, B_1) → a
27. Point(a) → C_1
28. Segment(D_1, E_1) → b
29. Segment(F_1, G_1) → h_1
30. Point(h_1) → H_1
31. Circle(F_1, H_1) → c_1
32. Circle(G_1, Radius[c_1]) → d_1
33. Intersect(d_1, h_1, 1) → I_1
34. Segment(I_1, H_1) → i_1
35. Segment(J_1, K_1) → j_1
36. Intersect(c_1, d_1, 1) → L_1
37. Intersect(c_1, d_1, 2) → M_1
38. Segment(L_1, M_1) → k_1
39. Circle(J_1, N_1) → e_1
40. Circle(K_1, Radius[e_1]) → p_1
41. Intersect(e_1, p_1, 2) → O_1
42. Intersect(e_1, p_1, 1) → P_1
43. Segment(O_1, P_1) → l_1