旋转探索活动：几何变换与图形分析

GeoGebra 命令及参数

1. Polygon(A, B_{1}, C) → t1, c, a, b
2. Intersect(xAxis, yAxis) → O
3. Circle(O, B_{1}) → d
4. Circle(O, A) → e
5. Circle(O, C) → f
6. Rotate(A, 90°, O) → A'_{90}
7. Rotate(B_{1}, 90°, O) → B'_{90}
8. Rotate(C, 90°, O) → C'_{90}
9. Polygon(A'_{90}, B'_{90}, C'_{90}) → t90, AB_{90}, BC_{90}, AC_{90}
10. Rotate(A, 180°, O) → A'_{180}
11. Rotate(B_{1}, 180°, O) → B'_{180}
12. Rotate(C, 180°, O) → C'_{180}
13. Polygon(A'_{180}, B'_{180}, C'_{180}) → t180, AB_{180}, BC_{180}, AC_{180}
14. Rotate(A, 270°, O) → A'_{270}
15. Rotate(B_{1}, 270°, O) → B'_{270}
16. Rotate(C, 270°, O) → C'_{270}
17. Polygon(A'_{270}, B'_{270}, C'_{270}) → t270, AB_{270}, BC_{270}, AC_{270}
18. Segment(B'_{90}, B'_{270}) → m
19. Segment(B'_{180}, B_{1}) → n
20. Segment(A'_{90}, A'_{270}) → p
21. Segment(A, A'_{180}) → q
22. Segment(C'_{90}, C'_{270}) → r
23. Segment(C, C'_{180}) → s