滑块控制的顺/逆时针旋转对比

GeoGebra 命令及参数

1. Polygon(A, B, C) → t1, c, a, b
2. Rotate(A, α, D) → A'
3. Rotate(B, α, D) → B'
4. Rotate(C, α, D) → C'
5. Polygon(A', B', C') → t1', c', a', b'
6. Rotate(A, (-β), D) → A'_1
7. Rotate(B, (-β), D) → B'_1
8. Rotate(C, (-β), D) → C'_1
9. Polygon(A'_1, B'_1, C'_1) → t1'_1, c'_1, a'_1, b'_1
10. Segment(C, D) → f
11. Segment(D, C'_1) → g
12. Segment(A, D) → h
13. Segment(D, A'_1) → i
14. Angle(A, D, A'_1) → δ
15. Segment(B, D) → j
16. Segment(D, A) → k
17. Segment(D, B'_1) → l
18. Segment(A, D) → m
19. Angle(C, D, C') → γ
20. Segment(D, C') → n