平行四边形与菱形的性质 by Gerald Del Norte

GeoGebra 命令及参数

1. Segment(A, z) → a
2. OrthogonalLine(z, a) → b
3. OrthogonalLine(z, b) → c
4. Mirror(A, z) → C
5. Mirror(z, z) → P
6. Segment(C, P) → a'
7. Rotate(z, α, z) → B'_1
8. Line(z, A) → d
9. Rotate(d, α, z) → d'
10. Point(d') → D
11. Segment(D, z) → e
12. Mirror(D, z) → B
13. Mirror(z, z) → B'_2
14. Segment(B, B'_2) → e'
15. Polygon(A, D, C, B) → poly1, a_1, c_1, a'_1, c'
16. Segment(A, P) → f
17. Segment(P, C) → g
18. Segment(B, P) → h
19. Segment(P, D) → i
20. Angle(A, P, B) → α_1
21. Angle(B, P, C) → β
22. Angle(C, P, D) → γ
23. Angle(D, P, A) → δ
24. Angle(B, P, A) → δ_1
25. Angle(A, P, D) → γ_1
26. Angle(D, P, C) → β_1
27. Angle(C, P, B) → α_2
28. Polygon(C, D, A, B) → poly2, c_2, d_1, a_2, b_1
29. Distance(B, A) → distanceBA
30. Distance(A, D) → distanceAD
31. Distance(C, D) → distanceCD
32. Distance(B, C) → distanceBC
33. Distance(D, C) → distanceDC
34. Distance(C, B) → distanceCB
35. Distance(B, A) → j