梯形到矩形的转换

GeoGebra 命令及参数

1. Segment(A, B) → Base2
2. Line(C, Base2) → b
3. Point(b) → D
4. Polygon(A, B, D, C) → poly1, a_1, b_1, Base1, c
5. OrthogonalLine(E, Base2) → e
6. Intersect(e, Base2) → F
7. Intersect(Base1, poly1) → G, H
8. Intersect(e, Base1) → I
9. Segment(F, I) → f
10. LineBisector(f) → g
11. Intersect(c, g) → J
12. Intersect(b_1, g) → K
13. Intersect(f, g) → L
14. Polygon(A, J, K, B) → poly2, a_2, j, k, b_2
15. Polygon(J, C, D, K) → poly3, j_1, c_1, d_1, k_1
16. Line(M, f) → h
17. Mirror(A, h) → A'
18. Mirror(J, h) → J'
19. Mirror(K, h) → K'
20. Mirror(B, h) → B'
21. Polygon(A', J', K', B') → poly2', a', j', k', b'
22. Mirror(J, h) → J'_1
23. Mirror(C, h) → C'
24. Mirror(D, h) → D'
25. Mirror(K, h) → K'_1
26. Polygon(J'_1, C', D', K'_1) → poly3', j'_1, Base1_2, d', k'_1
27. Rotate(A', -180*°, J') → A''
28. Rotate(J', -180*°, J') → J''
29. Rotate(K', -180*°, J') → K''
30. Rotate(B', -180*°, J') → B''
31. Polygon(A'', J'', K'', B'') → poly2'', a'', j'', k'', Base_1
32. OrthogonalLine(K', Base1_2) → i
33. Intersect(i, Base1_2) → N
34. Segment(K', N) → l
35. Segment(D', B'') → Base
36. Segment(C, D) → n
37. Segment(A, B) → p
38. Segment(F, I) → q
39. Polygon(K', D', B'', K'') → poly4, k'_2, d'_1, b''_1, k''_1
40. Segment(D', B'') → a
41. Line(A, B) → d
42. Point(d) → O
43. OrthogonalLine(O, d) → r
44. Point(g) → P
45. OrthogonalLine(P, g) → s
46. Intersect(s, b) → Q
47. Intersect(b, r) → R
48. Segment(O, R) → t
49. Segment(P, Q) → e_1