平行四边形的角平分线

GeoGebra 命令及参数

1. Polygon(A, B, C, D) → poly1, a, b, c, d
2. AngularBisector(D, A, B) → f
3. AngularBisector(B, C, D) → g
4. AngularBisector(C, D, A) → h
5. AngularBisector(A, B, C) → i
6. Intersect(f, c) → E
7. Intersect(i, c) → F
8. Intersect(h, a) → H
9. Intersect(g, a) → J
10. Segment(D, H) → j
11. Segment(J, C) → k
12. Segment(F, B) → l
13. Segment(E, A) → m
14. Angle(H, D, A) → α
15. Angle(C, D, H) → β
16. Angle(A, B, F) → γ
17. Angle(F, B, C) → δ
18. Intersect(j, k) → I
19. Intersect(l, m) → G
20. Angle(B, G, A) → ε
21. Angle(D, I, C) → ζ
22. Intersect(j, m) → K
23. Intersect(k, l) → N
24. Segment(K, N) → n
25. Angle(N, K, H) → η
26. Angle(D, A, E) → θ
27. Angle(E, A, B) → ι
28. Angle(B, C, J) → κ
29. Angle(J, C, D) → λ
30. Intersect(f, i) → L
31. Angle(B, L, A) → μ
32. Segment(E, L) → p
33. Segment(L, F) → q
34. Intersect(g, h) → M
35. Angle(D, M, C) → ν
36. Segment(H, M) → r
37. Segment(M, J) → s