平行线与平行四边形的变换

GeoGebra 命令及参数

1. Line(A_1, B) → a
2. Line(A_1, C) → b
3. Line(C, a) → c
4. Line(B, b) → d
5. Intersect(c, d) → D
6. Segment(A_1, B) → e
7. Segment(B, D) → f
8. Segment(D, C) → g
9. Segment(C, A_1) → h
10. Segment(A_1, B) → i
11. Segment(B, C) → j
12. Point(h) → E
13. Point(j) → F
14. Polygon(C, E, F) → poly1, f_1, c_1, e_1
15. Vector(C, B) → u
16. Translate(C, u) → C'
17. Translate(E, u) → E'
18. Translate(F, u) → F'
19. Polygon(C', E', F') → poly1', f', c', e'
20. Rotate(C', 180*°, B) → C''
21. Rotate(E', 180*°, B) → E''
22. Rotate(F', 180*°, B) → F''
23. Polygon(C'', E'', F'') → poly1'', f'', c'', e''
24. Mirror(C, j) → C'_1
25. Mirror(E, j) → E'_1
26. Mirror(F, j) → F'_1
27. Polygon(C'_1, E'_1, F'_1) → poly1'_1, f'_1, c'_1, e'_1
28. Line(A_1, C) → n
29. Line(C, B) → p
30. Line(B, D) → q
31. Angle(B, C, A_1) → A
32. Intersect(f', c') → G
33. Ray(B, G) → r
34. Intersect(c', e') → H
35. Ray(B, H) → s
36. Line(A_1, B) → l
37. Line(C, D) → a_1
38. Line(B, C) → b_1