火车过桥加法演示

GeoGebra 命令及参数

1. Random(6, 20) → aa
2. Segment(B, H) → r_5
3. Polygon(S_4, T_4, U_4, V_4) → poly25, s_6, t_6, u_4, v_4
4. Polygon(W_4, Z_4, A_5, B_5) → poly26, w_4, z_4, a_7, b_7
5. Polygon(C_5, D_5, E_5, F_5) → poly27, c_8, d_7, e_8, f_8
6. Polygon(G_5, H_5, I_5, J_5) → poly28, g_8, h_8, i_7, j_7
7. Polygon(K_5, L_5, M_5, N_5) → poly29, k_8, l_8, m_8, n_8
8. Polygon(O_5, P_5, Q_5, R_5) → poly30, o_5, p_8, q_8, r_8
9. Polygon(S_5, T_5, U_5, V_5) → poly31, s_7, t_7, u_5, v_5
10. Polygon(W_5, Z_5, A_6, B_6) → poly32, w_5, z_5, a_8, b_8
11. If(x(F_5) ≥ -2 ∨ x(N_5) ≥ -2 ∨ x(P_5) ≥ -2 ∨ x(Z_5) ≥ -2 ∨ x(Z_4) ≥ -2 ∨ x(J_5) ≥ -2 ∨ x(T_5) ≥ -2 ∨ x(T_4) ≥ -2, 1, 0) → rr
12. Polygon(B, H, C, D) → poly1, b, h, c, d
13. If(y(C_5) ≟ 0 ∨ y(K_5) ≟ 0 ∨ y(O_5) ≟ 0 ∨ y(W_5) ≟ 0 ∨ y(W_4) ≟ 0 ∨ y(G_5) ≟ 0 ∨ y(S_5) ≟ 0 ∨ y(S_4) ≟ 0, 1, 0) → ss
14. Point(b) → J
15. Polygon(E, J, D, I, G, F) → poly2, e, j, d_1, i, g, f
16. Intersect(h, b) → O
17. Polygon(O, K, L, M, N, C) → poly3, o_1, k, l, m, n, c_1
18. Midpoint(D, C) → P
19. Polygon(R, Q, S, V, U, T) → poly4, r, q, s, v, u, t
20. If(Distance[b, c_8] < 0.2, 2, 0) → dd1
21. If(Distance[b_7, b] < 0.2, 1, 0) → dd2
22. If(Distance[g_8, b] < 0.2, 3, 0) → dd3
23. If(Distance[k_8, b] < 0.2, 4, 0) → dd4
24. If(Distance[r_8, b] < 0.2, 5, 0) → dd5
25. If(Distance[v_5, b] < 0.2, 6, 0) → dd6
26. If(Distance[b_8, b] < 0.2, 7, 0) → dd7
27. If(Distance[v_4, b] < 0.2, 8, 0) → dd8
28. If(som ≟ aa, true, false) → pp
29. Polygon(G, M, L, Z, A_1, F) → poly5, g_1, m_1, l_1, z, a_1, f_1
30. Polygon(B_1, D_1, F, A_1, C_1) → poly6, b_1, d_2, f_2, a_2, c_2
31. Polygon(F_1, E_1, G_1, Z) → poly7, f_3, e_1, g_2, z_1
32. Segment(H + (0, 0.15), B + (0, 0.15)) → h_1
33. Segment(B_1 + (0, 0.1), B + (0, 0.1)) → p
34. Segment(B_1 + (0, 0.15), B + (0, 0.15)) → i_1
35. Segment(H + (0, 0.1), E_1 + (0, 0.1)) → j_1
36. Segment(H + (0, 0.15), E_1 + (0, 0.15)) → k_1
37. Segment(H + (0, 0.1), B + (0, 0.1)) → n_1
38. Intersect(c_2, a_2) → H_1
39. Polygon(H_1, I_1, J_1, K_1) → poly8, h_2, i_2, j_2, k_2