三角形的旋转

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, 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') → poly1', c', a', b'
6. Rotate(A, α, B) → A'_2
7. Rotate(B, α, B) → B'_2
8. Rotate(C, α, B) → C'_2
9. Polygon(A'_2, B'_2, C'_2) → poly1'_1, c'_2, a'_2, b'_2
10. Segment(B', D) → f
11. Segment(C', D) → g
12. Segment(A', D) → h
13. Segment(C, D) → i
14. Segment(B, D) → j
15. Segment(A, D) → k
16. Segment(A, B) → l
17. Segment(C, B) → m
18. Segment(C'_2, B) → n
19. Segment(A'_2, B) → p
20. Circle(D, A) → r
21. Circle(D, B) → s
22. Circle(D, C) → t
23. Circle(B, A) → c_1
24. Circle(B, C) → d_1
25. Textfield(D) → inputBox1