旋转多边形2

GeoGebra 命令及参数

1. Line(A, B) → a
2. Polygon(A, B, C) → poly1, c, a_1, b
3. Angle(poly1) → α, β, γ
4. Midpoint(a_1) → D
5. Rotate(A, -P, D) → A'
6. Rotate(B, -P, D) → B'
7. Rotate(C, -P, D) → C'
8. Polygon(A', B', C') → poly1', c', a', b'
9. Angle(poly1') → δ, ε, ζ
10. Midpoint(b') → E
11. Rotate(A', -Q, E) → A''
12. Rotate(B', -Q, E) → B''
13. Rotate(C', -Q, E) → C''
14. Polygon(A'', B'', C'') → poly1'', c'', a'', b''
15. Angle(poly1'') → η, θ, ι