六边形周长估算圆周长

GeoGebra 命令及参数

1. Polygon((Edge, y(Corner[1])), Corner[2], Corner[3], (Edge, y(Corner[4]))) → Mask, a, b, c, d
2. Circle(P, B) → MainCircle
3. Rotate(B, (360 * ° / numberOfSides), P) → C
4. Polygon(B, C, numberOfSides) → MainPoly, BC, m, R, S, T, U, V, W, Z, A_1, B_1, C_1, n, D_1, E_1, F_1, G_1, H_1, I_1, J_1, K_1, L_1, M_1, p, N_1, O_1, P_1, Q_1, R_1, S_1, T_1, U_1, V_1, W_1, q, Z_1, A_2, B_2, C_2, D_2, E_2, F_2, G_2, H_2, I_2, r, J_2, K_2, L_2, M_2, N_2, O_2, P_2, Q_2, R_2, S_2, s, T_2, U_2, V_2, W_2, Z_2, A_3, B_3, C_3, D_3, E_3, t, F_3, G_3, H_3, I_3, J_3, K_3, L_3, M_3, N_3, O_3, a_1, P_3, b_1, c_1, e, d_1, e_1, f_1, g_1, h_1, i_1, j_1, k_1, l_1, m_1, f, n_1, p_1, q_1, r_1, s_1, t_1, a_2, b_2, c_2, d_2, g, e_2, f_2, g_2, h_2, i_2, j_2, k_2, l_2, m_2, n_2, h, p_2, q_2, r_2, s_2, t_2, a_3, b_3, c_3, d_3, e_3, i, f_3, g_3, h_3, i_3, j_3, k_3, l_3, m_3, n_3, p_3, j, q_3, r_3, s_3, t_3, a_4, b_4, c_4, d_4, e_4, f_4, k, g_4, h_4, i_4, j_4, k_4, l_4, m_4, A, E, F, l, G, H, I, J, K, L, M, N, O, Q
5. Midpoint(BC) → D
6. Segment(P, B) → BP
7. Segment(P, C) → CP
8. Segment(D, P) → DP
9. Angle(B, P, C) → BPC
10. Angle(B, P, D) → BPD
11. Segment(D, B) → BD