平行四边形的性质 by Kaitlyn Valint

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Segment(A, D) → b
3. Line(D, a) → c
4. Line(B, b) → d
5. Intersect(c, d) → C
6. Segment(D, C) → e
7. Segment(C, B) → f
8. Segment(D, B) → g
9. Segment(A, C) → h
10. Intersect(g, h) → E
11. Distance(e, a) → i
12. Distance(D, E) → distanceDE
13. Distance(E, B) → distanceEB
14. Distance(C, E) → distanceCE
15. Distance(E, A) → distanceEA
16. Angle(A, D, C) → α
17. Angle(D, C, B) → β
18. Angle(C, B, A) → γ
19. Angle(B, A, D) → δ
20. Slope(b) → m
21. Slope(f) → m_1
22. Slope(e) → m_2
23. Slope(a) → m_3
24. Distance(D, C) → distanceDC
25. Distance(C, B) → distanceCB
26. Distance(B, A) → distanceBA
27. Distance(A, D) → distanceAD