正方形中的十字形面积探究

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Circle(A, x1) → c
3. Intersect(c, yAxis, 2) → E
4. Circle(E, y1) → e
5. Intersect(e, yAxis, 2) → F
6. Circle(F, x1) → f
7. Intersect(f, yAxis, 2) → G
8. Circle(G, y1) → g
9. Intersect(g, yAxis, 2) → H
10. Circle(H, x1) → h
11. Intersect(h, yAxis, 2) → D
12. Polygon(D, A, 4) → poly1, i, j, k, l, B, C
13. OrthogonalLine(H, yAxis) → m
14. OrthogonalLine(G, yAxis) → n
15. OrthogonalLine(F, yAxis) → p
16. OrthogonalLine(E, yAxis) → q
17. Intersect(c, xAxis, 2) → I
18. Circle(I, y1) → r
19. Intersect(r, xAxis, 2) → J
20. Circle(J, x1) → s
21. Intersect(s, xAxis, 2) → K
22. Circle(K, y1) → t
23. Intersect(t, xAxis, 2) → L
24. OrthogonalLine(L, xAxis) → a
25. OrthogonalLine(K, xAxis) → f_1
26. OrthogonalLine(J, xAxis) → g_1
27. OrthogonalLine(I, xAxis) → h_1
28. Intersect(m, g_1) → M
29. Intersect(m, f_1) → N
30. Intersect(n, f_1) → O
31. Intersect(n, a) → P
32. Intersect(p, a) → Q
33. Intersect(p, f_1) → R
34. Intersect(q, f_1) → S
35. Intersect(s, q, 1) → T
36. Intersect(p, g_1) → U
37. Intersect(f, p, 1) → V
38. Intersect(n, h_1) → W
39. Intersect(n, g_1) → Z
40. Polygon(M, N, W, Z, O, P, Q, R, S, T, U, V) → poly2, m_1, v, w, z_1, n_1, o, p_1, q_1, r_1, s_1, t_1, u
41. Polygon(A, B, C, D) → q1, a_2, g_2, h_2, f_2
42. Centroid(poly2) → A_1