正方形的旋转对称性演示

GeoGebra 命令及参数

1. Segment(A, B) → f
2. OrthogonalLine(A, f) → g
3. Circle(A, Segment[A, B]) → c
4. Circle(B, Segment[A, B]) → d
5. Intersect(c, g, 1) → C
6. Circle(C, Segment[A, B]) → e
7. Intersect(d, e, 1) → D
8. Segment(C, D) → h
9. Segment(D, B) → i
10. Segment(A, C) → j
11. Angle(A, B, D) → α
12. Angle(B, D, C) → β
13. Angle(D, C, A) → γ
14. Angle(C, A, B) → δ
15. Polygon(A, B, D, C) → poly1, a, b, d_1, c_1
16. Vector(F, H) → u
17. Vector(F, I) → v
18. Angle(I, F, H) → ε
19. Segment(A, D) → k
20. Segment(B, C) → l
21. Intersect(k, l) → E
22. Rotate(A, ε, E) → A'
23. Rotate(B, ε, E) → B'
24. Rotate(D, ε, E) → D'
25. Rotate(C, ε, E) → C'
26. Polygon(A', B', D', C') → poly1', a', b', d', c'