等腰梯形的性质探究 by matthew.hardie

GeoGebra 命令及参数

1. Segment(A, D) → a
2. Segment(D, C) → b
3. LineBisector(b) → c
4. Mirror(A, c) → B
5. Segment(A, B) → d
6. Segment(B, C) → e
7. Segment(A, C) → f
8. Segment(B, D) → g
9. Intersect(f, g) → E
10. Distance(A, C) → distanceAC
11. Distance(A, E) → distanceAE
12. Distance(C, E) → distanceCE
13. Distance(B, E) → distanceBE
14. Distance(D, E) → distanceDE
15. Distance(B, D) → distanceBD
16. Polygon(A, D, C, B) → poly1, a_1, d_1, c_1, b_1
17. Angle(E, A, B) → α
18. Angle(D, A, E) → β
19. Angle(D, A, B) → γ
20. Distance(A, D) → distanceAD
21. Distance(A, B) → distanceAB
22. Distance(D, C) → distanceDC
23. Distance(B, C) → distanceBC
24. Angle(A, B, E) → δ
25. Angle(E, B, C) → ε
26. Angle(B, C, E) → ζ
27. Angle(E, C, D) → η
28. Angle(C, D, E) → θ
29. Angle(E, D, A) → ι
30. Angle(A, B, C) → κ
31. Angle(B, C, D) → λ
32. Angle(C, D, A) → μ
33. Angle(B, E, A) → ν
34. Angle(C, E, B) → ξ
35. Angle(D, E, C) → ο
36. Angle(A, E, D) → ρ