相似变换演示 by Christina Bulen

GeoGebra 命令及参数

1. Polygon(A, B, C) → poly1, c, a, b
2. Segment(A, B) → d
3. Segment(B, C) → e
4. Segment(C, A) → f
5. Textfield(k) → InputBox1
6. Dilate(A, k, O) → A'
7. Dilate(B, k, O) → B'
8. Dilate(C, k, O) → C'
9. Polygon(A', B', C') → poly1', c', a', b'
10. Dilate(A, k, O) → A'_1
11. Dilate(B, k, O) → B'_1
12. Segment(A'_1, B'_1) → d'
13. Dilate(B, k, O) → B'_2
14. Dilate(C, k, O) → C'_1
15. Segment(B'_2, C'_1) → e'
16. Dilate(C, k, O) → C'_2
17. Dilate(A, k, O) → A'_2
18. Segment(C'_2, A'_2) → f'
19. Segment(O, A') → g
20. Segment(O, A) → h
21. Segment(O, B) → i
22. Segment(O, B') → j
23. Segment(O, C') → l
24. Segment(O, C) → m