平行四边形性质与作图 by Brittany Wilson

GeoGebra 命令及参数

1. Line(A, B) → a
2. Line(C_1, a) → b
3. Line(A, b) → c
4. Line(A, C_1) → d
5. Line(B, b) → e
6. Line(B, d) → f
7. Intersect(b, d) → E
8. Segment(C_1, A) → AC
9. Intersect(b, f) → G_1
10. Segment(B, G_1) → h
11. Segment(G_1, C_1) → i
12. Segment(A, B) → j
13. Distance(A, B) → distanceAB
14. Distance(C_1, G_1) → distanceCG
15. Distance(A, C_1) → distanceAC
16. Distance(B, G_1) → distanceBG
17. Angle(G_1, C_1, A) → α
18. Angle(A, B, G_1) → β
19. Angle(C_1, A, B) → γ
20. Angle(B, G_1, C_1) → δ
21. Segment(A, G_1) → k
22. Segment(C_1, B) → l
23. Intersect(k, l) → H
24. Distance(A, H) → distanceAH
25. Distance(H, G_1) → distanceHG
26. Distance(B, H) → distanceBH
27. Distance(C_1, H) → distanceCH
28. Intersect(AC, i) → C
29. Intersect(h, i) → G
30. Distance(C, H) → g
31. Distance(G, H) → distanceGH
32. Distance(C, G) → m
33. Distance(G, B) → distanceGB
34. Slope(j) → m_1
35. Slope(i) → m_2
36. Slope(h) → m_3
37. Slope(AC) → m_4