等腰梯形的几何性质探究

GeoGebra 命令及参数

1. Segment(A, B) → a
2. LineBisector(a) → b
3. Intersect(b, a) → C_1
4. Segment(A, D) → c
5. Mirror(D, b) → C
6. Segment(C, B) → d
7. Segment(C, D) → e
8. Angle(B, A, D) → α
9. Angle(A, D, C) → β
10. Angle(D, C, B) → γ
11. Angle(C, B, A) → δ
12. Distance(A, D) → distanceAD
13. Distance(D, C) → distanceDD'
14. Distance(C, B) → distanceD'B
15. Distance(B, A) → distanceBA
16. Slope(e) → m
17. Slope(a) → m_1
18. Segment(A, C) → i
19. Segment(B, D) → j
20. Intersect(i, j) → E
21. Distance(A, E) → distanceAE
22. Distance(E, C) → distanceED'
23. Distance(B, E) → distanceBE
24. Distance(E, D) → distanceED
25. Distance(A, C) → distanceAD'
26. Distance(D, B) → distanceDB
27. Slope(c) → m_4
28. Slope(d) → m_5
29. Midpoint(c) → H
30. Midpoint(d) → I
31. Segment(H, I) → l
32. Distance(H, I) → distanceHI
33. Slope(l) → m_2