旋转对称性交互演示

GeoGebra 命令及参数

1. Polygon(C, D, a) → poly1, b, n, p, q, r, s, t, E, F, G, H, c, J, K, L, M, N, O_1, P, Q, R, d, e, f, g, j, k, m
2. LineBisector(c) → h
3. LineBisector(d) → i
4. Intersect(h, i) → I
5. Rotate(poly1, α, I) → poly1'
6. Rotate(F, α, I) → F'
7. Polygon(W, Z, A_1, B_1) → poly2, w, z, a_1, b_1
8. Segment(Z, B_1) → c_1
9. Segment(A_1, W) → d_1
10. Intersect(c_1, d_1) → C_1
11. Rotate(W, β, C_1) → W'
12. Rotate(Z, β, C_1) → Z'
13. Rotate(A_1, β, C_1) → D_1
14. Rotate(B_1, β, C_1) → E_1
15. Polygon(W', Z', D_1, E_1) → poly2', w', z', d_2, e_1