平行四边形面积计算 by Daniel Mentrard

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → O
2. Vector(O, A) → u
3. Vector(O, B) → v
4. Translate(A, v) → P
5. Polygon(O, A, P, B) → poly1, o, a, p, b
6. Polygon(O, C, A) → poly2, a_1, o_1, c
7. Polygon(H, B, P) → poly3, p_1, h, b_1
8. Polygon(P, A, E) → poly4, e, p_2, a_2
9. Polygon(F, B, O) → poly5, o_2, f, b_2
10. Polygon(A, C, D, E) → poly6, a_3, c_1, d, e_1
11. Polygon(F, B, H, G) → poly7, f_1, b_3, h_1, g
12. Segment(B, P) → i
13. Segment(P, A) → j
14. Segment(A, E) → k
15. Segment(E, P) → l
16. Segment(D, E) → m
17. Segment(A, C) → n
18. Segment(H, P) → q
19. Segment(H, B) → r
20. Segment(B, F) → s
21. Segment(G, H) → t
22. Centroid(poly2) → I
23. Centroid(poly1) → J
24. Centroid(poly3) → K
25. Centroid(poly4) → L
26. Centroid(poly5) → M
27. Centroid(poly6) → N
28. Centroid(poly7) → Q
29. Midpoint(Z, B_1) → F_1
30. Midpoint(Z, A_1) → G_1
31. Midpoint(W, V) → H_1
32. Midpoint(V, U) → I_1
33. Midpoint(R, S) → J_1
34. Midpoint(S, T) → K_1
35. Midpoint(D_1, E_1) → L_1
36. Midpoint(E_1, C_1) → M_1
37. Vector(F_1, B_1) → w
38. Vector(F_1, Z) → u_1
39. Vector(G_1, Z) → v_1
40. Vector(G_1, A_1) → w_1
41. Vector(H_1, W) → d_1
42. Vector(H_1, V) → g_1
43. Vector(I_1, V) → i_1
44. Vector(I_1, U) → j_1
45. Vector(J_1, S) → k_1
46. Vector(J_1, R) → l_1
47. Vector(K_1, S) → m_1
48. Vector(K_1, T) → n_1
49. Vector(L_1, E_1) → q_1
50. Vector(L_1, D_1) → r_1
51. Vector(M_1, C_1) → s_1
52. Vector(M_1, E_1) → t_1