对称性与几何构造演示

GeoGebra 命令及参数

1. Point(xAxis) → B
2. Midpoint(A, B) → E
3. Midpoint(B, D) → F
4. Midpoint(D, C) → G
5. Midpoint(C, A) → H
6. Midpoint(C, B) → I
7. Vector(A, B) → u
8. Vector(A, C) → v
9. Vector(C, D) → w
10. Vector(B, D) → a
11. Segment(H, F) → b
12. Segment(E, G) → c
13. Segment(J, K) → e
14. Segment(K, L) → f
15. Segment(K, M) → g
16. Segment(K, N) → h
17. LineBisector(A, E) → j
18. LineBisector(E, B) → k
19. Mirror(cell1, j) → cell2
20. Mirror(cell1, I) → cell3
21. Mirror(cell2, I) → cell4
22. Sequence(Translate[Sequence[Translate[tile, Vector[(n * u)]], n, -3, 3], Vector[(m * v)]], m, -3, 3) → tiling
23. Line(H, F) → m