正方形与平行四边形性质演示

GeoGebra 命令及参数

1. Segment(A, B) → f
2. LineBisector(f) → g
3. Intersect(g, f) → C
4. Circle(C, A) → c
5. Intersect(c, g, 2) → D
6. Intersect(c, g, 1) → E
7. Polygon(A, D, B, E) → q1, a, d, b, e
8. Intersect(b, e) → F
9. Intersect(a, d) → G
10. Segment(F, G) → h
11. Angle(B, E, A) → α
12. Angle(E, A, D) → β
13. Angle(A, D, B) → γ
14. Angle(D, B, E) → δ
15. Segment(A, D) → k
16. Segment(E, B) → l
17. Segment(E, A) → m
18. Segment(B, D) → n
19. Line(H, J) → p
20. Line(I, p) → q
21. Line(I, J) → r
22. Line(H, r) → s
23. Intersect(q, s) → K
24. Polygon(H, J, I, K) → q2, h_1, j_1, i_1, k_1
25. Segment(H, J) → t
26. Segment(K, I) → f_1
27. Segment(K, H) → g_1
28. Segment(I, J) → l_1
29. Segment(H, I) → m_1
30. Segment(K, J) → n_1
31. Angle(I, K, H) → ε
32. Angle(H, J, I) → ζ
33. Angle(J, I, K) → η
34. Angle(K, H, J) → θ