三角形缩放演示

GeoGebra 命令及参数

1. Polygon(B, C, D) → poly1, d, b, c
2. Dilate(B, a, A) → B'
3. Dilate(C, a, A) → C'
4. Dilate(D, a, A) → D'
5. Polygon(B', C', D') → poly1', d', b', c'
6. Ray(A, D) → e
7. Ray(A, B) → f
8. Ray(A, C) → g
9. Distance(A, D) → distanceAD
10. Distance(A, D') → distanceAD'
11. Distance(A, B) → distanceAB
12. Distance(A, B') → distanceAB'
13. Distance(A, C) → distanceAC
14. Distance(A, C') → distanceAC'
15. Distance(B, C) → distanceBC
16. Distance(B', C') → distanceB'C'
17. Distance(D', C') → distanceD'C'
18. Distance(D, C) → distanceDC
19. Distance(B, D) → distanceBD
20. Distance(B', D') → distanceB'D'
21. Dilate(B_1, a, A_1) → B'_1
22. Dilate(D_1, a, A_1) → D'_1
23. Ray(A_1, D_1) → e_1
24. Ray(A_1, B_1) → f_1
25. Distance(A_1, D_1) → distanceAD_1
26. Distance(A_1, D'_1) → distanceAD'_1
27. Distance(A_1, B_1) → distanceAB_1
28. Distance(A_1, B'_1) → distanceAB'_1
29. Distance(B_1, D_1) → distanceBD_1
30. Distance(B'_1, D'_1) → distanceB'D'_1
31. Dilate(B_2, a, A_2) → B'_2
32. Dilate(C_1, a, A_2) → C'_1
33. Ray(A_2, B_2) → f_2
34. Ray(A_2, C_1) → g_1
35. Distance(A_2, B_2) → distanceAB_2
36. Distance(A_2, B'_2) → distanceAB'_2
37. Distance(A_2, C_1) → distanceAC_1
38. Distance(A_2, C'_1) → distanceAC'_1
39. Distance(B_2, C_1) → distanceBC_1
40. Distance(B'_2, C'_1) → distanceB'C'_1