利用内接多边形估算圆周率

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Rotate(B, (360 / a)°, A) → B'
3. Distance(B, A) → r
4. Distance(B, B') → l
5. Polygon(B, B', a) → poly1, b, m, j_5, k_5, l_5, m_5, n_5, p_5, q_5, r_5, s_5, t_5, n, a_6, b_6, c_6, d_6, e_6, f_6, g_6, h_6, i_6, j_6, q, k_6, l_6, m_6, n_6, p_6, q_6, r_6, s_6, t_6, a_7, s, b_7, c_7, d_7, e_7, f_7, g_7, h_7, i_7, j_7, k_7, t, l_7, m_7, n_7, p_7, q_7, r_7, s_7, t_7, a_8, b_8, a_1, c_8, d_8, e_8, f_8, g_8, h_8, i_8, j_8, k_8, l_8, b_1, m_8, n_8, p_8, q_8, r_8, s_8, t_8, a_9, b_9, c_9, c_1, d_9, e_9, f_9, g_9, h_9, i_9, j_9, k_9, l_9, m_9, d_1, n_9, p_9, q_9, r_9, s_9, t_9, a_{10}, b_{10}, c_{10}, d_{10}, e_1, e_{10}, f_{10}, g_{10}, h_{10}, i_{10}, j_{10}, k_{10}, l_{10}, m_{10}, n_{10}, b', f_1, p_{10}, C, D, E, F, G, H, I, J, K, g_1, L, M, N, O, P, R, S, T, U, V, h_1, W, Z, A_1, B_1, C_1, D_1, E_1, F_1, G_1, H_1, i_1, I_1, J_1, K_1, L_1, M_1, N_1, O_1, P_1, Q_1, R_1, j_1, S_1, T_1, U_1, V_1, W_1, Z_1, A_2, B_2, C_2, D_2, k_1, E_2, F_2, G_2, H_2, I_2, J_2, K_2, L_2, M_2, N_2, l_1, O_2, P_2, Q_2, R_2, S_2, T_2, U_2, V_2, W_2, Z_2, m_1, A_3, B_3, C_3, D_3, E_3, F_3, G_3, H_3, I_3, J_3, n_1, K_3, L_3, M_3, N_3, O_3, P_3, Q_3, R_3, S_3, T_3, p_1, U_3, V_3, W_3, Z_3, A_4, B_4, C_4, D_4, E_4, F_4, e, q_1, G_4, H_4, I_4, J_4, K_4, L_4, M_4, N_4, O_4, P_4, r_1, Q_4, R_4, S_4, T_4, U_4, V_4, W_4, Z_4, A_5, B_5, s_1, C_5, D_5, E_5, F_5, G_5, H_5, I_5, J_5, K_5, L_5, t_1, M_5, N_5, O_5, P_5, Q_5, R_5, S_5, T_5, U_5, V_5, a_2, W_5, Z_5, A_6, B_6, C_6, D_6, E_6, F_6, G_6, H_6, b_2, I_6, J_6, K_6, L_6, M_6, N_6, O_6, P_6, Q_6, R_6, c_2, S_6, T_6, U_6, V_6, W_6, Z_6, A_7, B_7, C_7, D_7, d_2, E_7, F_7, G_7, H_7, I_7, J_7, K_7, L_7, M_7, N_7, e_2, O_7, P_7, Q_7, R_7, S_7, T_7, U_7, V_7, W_7, Z_7, f_2, A_8, B_8, C_8, D_8, E_8, F_8, G_8, H_8, I_8, f, g_2, h_2, i_2, j_2, k_2, l_2, m_2, n_2, p_2, q_2, g, r_2, s_2, t_2, a_3, b_3, c_3, d_3, e_3, f_3, g_3, h, h_3, i_3, j_3, k_3, l_3, m_3, n_3, p_3, q_3, r_3, i, s_3, t_3, a_4, b_4, c_4, d_4, e_4, f_4, g_4, h_4, j, i_4, j_4, k_4, l_4, m_4, n_4, p_4, q_4, r_4, s_4, k, t_4, a_5, b_5, c_5, d_5, e_5, f_5, g_5, h_5, i_5