不规则图形面积计算

GeoGebra 命令及参数

1. Polygon(A, B, 4) → poly1, a, b, c, d, C, D
2. Polygon(E, F, 4) → poly2, e, f, g, h, G, H
3. Polygon(I, J, 4) → poly3, i, j, k, l, K, L
4. Polygon(M, N, 4) → poly4, m, n, p, q, O, P
5. Polygon(Q, R, 4) → poly5, q_1, r, s, t, S, T
6. Polygon(U, V, 4) → poly6, u, v, a_1, b_1, W, Z
7. Polygon(A_1, B_1, 4) → poly7, a_2, b_2, c_1, d_1, C_1, D_1
8. Polygon(E_1, F_1, 4) → poly8, e_1, f_1, g_1, h_1, G_1, H_1
9. Polygon(I_1, J_1, 4) → poly9, i_1, j_1, k_1, l_1, K_1, L_1
10. Polygon(M_1, N_1, 4) → poly10, m_1, n_1, p_1, r_1, O_1, P_1
11. Polygon(Q_1, R_1, 4) → poly11, q_2, r_2, s_1, t_1, S_1, T_1
12. Polygon(U_1, V_1, 4) → poly12, u_1, v_1, c_2, d_2, W_1, Z_1
13. Polygon(A_2, B_2, C_2, D_2, E_2, F_2, G_2, H_2) → poly13, a_3, b_3, c_3, d_3, e_2, f_2, g_2, h_2
14. Polygon(I_2, J_2, K_2, L_2, M_2, N_2, O_2, P_2, Q_2, R_2) → poly14, i_2, r_3, j_2, k_2, l_2, m_2, n_2, o_2, p_2, q_3
15. Polygon(S_2, T_2, U_2, V_2, W_2, Z_2, A_3, B_3) → poly15, s_2, t_2, u_2, v_2, w_2, z_2, a_4, b_4
16. Polygon(W_3, Z_3, I_4, J_4, A_4, B_4, C_4, D_4, E_4, F_4, G_4, H_4) → poly17, w_3, h_4, i_4, j_4, z_3, a_5, b_5, c_5, d_5, e_4, f_4, g_4
17. Polygon(K_4, L_4, M_4, N_4, O_4, P_4, Q_4, R_4) → poly16, k_4, l_4, m_4, n_4, o_4, p_4, q_4, r_4