二维图形面积计算 by Mr_Stewart_Maths

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → poly1, a_1, b, c, d
2. Segment(A, B) → e
3. Segment(A, D) → f
4. Polygon(B_1, C_1, A) → poly2, a_2, b_1, c_1
5. Segment(B_1, A) → j
6. Segment(A, C_1) → k
7. Polygon(A, B_2, C_2, D_2) → poly3, a_3, b_2, c_2, d_2
8. Intersect(a_3, d_2) → E
9. Segment(B_2, E) → p
10. Segment(E, D_2) → q
11. Polygon(F, G, H, I) → poly4, f_1, g_1, h_1, i_1
12. Segment(G, H) → r
13. Segment(F, I) → s
14. Midpoint(F, I) → J
15. OrthogonalLine(J, i_1) → t
16. Intersect(t, g_1) → K
17. Segment(J, K) → d_1
18. Polygon(R, S, T) → poly6, t_1, r_1, s_1
19. OrthogonalLine(S, s_1) → q_1
20. Intersect(q_1, s_1) → U
21. Line(R, T) → e_2
22. Intersect(q_1, e_2) → V
23. Segment(V, S) → f_2
24. Segment(S, U) → g_2
25. Line(A_1, D_1) → h_2
26. OrthogonalLine(A_1, h_2) → i_2
27. Point(i_2) → W
28. Mirror(W, h_2) → W'
29. Point(h_2) → Z
30. Polygon(W', Z, W, D_1) → poly7, w', z_1, w_1, d_3
31. Segment(W', W) → j_2
32. Segment(D_1, Z) → k_2
33. Circle(E_1, F_1) → p_2
34. Segment(F_1, E_1) → l_2
35. Line(L, M) → e_1
36. Line(N, e_1) → j_1
37. Line(L, N) → k_1
38. Line(M, k_1) → l_1
39. Intersect(j_1, l_1) → O
40. Polygon(L, N, O, M) → poly5, l_3, n_1, o_1, m_1
41. Midpoint(L, N) → P
42. OrthogonalLine(P, k_1) → p_1
43. Intersect(l_1, p_1) → Q
44. Segment(P, Q) → m_2
45. Segment(M, O) → n_2
46. Segment(R, T) → q_2
47. Point(s_1) → G_1
48. Point(f_2) → H_1