几何旋转对称作图

GeoGebra 命令及参数

1. Polygon(A, B, 3) → poly1, f, g, h, C
2. OrthogonalLine(A, g) → i
3. OrthogonalLine(C, f) → j
4. OrthogonalLine(B, h) → k
5. Intersect(i, j) → R_1
6. Rotate(poly1, α, R_1) → poly1'
7. Polygon(D, E, 4) → poly2, l, m, n, p, F, G
8. LineBisector(p) → q
9. LineBisector(n) → r
10. Intersect(q, r) → R_2
11. Rotate(poly2, α, R_2) → poly2'
12. Polygon(H, I, 5) → poly3, s, t, a, b, c, J, K, L
13. OrthogonalLine(K, s) → d
14. OrthogonalLine(H, a) → e
15. OrthogonalLine(J, c) → f_1
16. OrthogonalLine(L, t) → g_1
17. OrthogonalLine(I, b) → h_1
18. Intersect(d, e) → R_3
19. Rotate(poly3, α, R_3) → poly3'
20. Polygon(M, N, 6) → poly4, i_1, R, j_1, k_1, l_1, m_1, n_1, O, P, Q
21. LineBisector(n_1) → p_1
22. LineBisector(m_1) → q_1
23. LineBisector(l_1) → r_1
24. Intersect(p_1, q_1) → R_4
25. Rotate(poly4, α, R_4) → poly4'
26. Polygon(S, T, 7) → poly5, s_1, W, Z, A_1, t_1, a_1, b_1, c_1, d_1, e_1, U, V
27. OrthogonalLine(S, b_1) → f_2
28. OrthogonalLine(W, s_1) → g_2
29. OrthogonalLine(A_1, a_1) → h_2
30. OrthogonalLine(Z, t_1) → i_2
31. Intersect(f_2, g_2) → R_5
32. Rotate(poly5, α, R_5) → poly5'
33. Polygon(B_1, C_1, 8) → poly6, j_2, E_1, F_1, G_1, H_1, I_1, k_2, l_2, m_2, n_2, p_2, q_2, r_2, D_1
34. LineBisector(r_2) → s_2
35. LineBisector(p_2) → t_2
36. LineBisector(q_2) → a_2
37. Intersect(s_2, t_2) → R_6
38. Rotate(poly6, α, R_6) → poly6'