平行四边形性质 by GMMDC

GeoGebra 命令及参数

1. Polygon(J, K, L, M) → poly2, j_1, k_1, l_1, m_1
2. PointIn(poly2) → N
3. Line(A, D) → l
4. PointIn(poly2) → B
5. AngularBisector(B, A, D) → d
6. Segment(D_1, E_1) → e
7. Intersect(e, d) → F_1
8. AngularBisector(D, A, B) → k
9. Corner(1, 1) → Cnr1
10. Corner(1, 2) → Cnr2
11. Corner(1, 3) → Cnr3
12. Corner(1, 4) → Cnr4
13. Polygon(CN1, CN2, CN3, CN4) → Panel, cn1, cn2, cn3, cn4
14. Angle(B, D, A) → γ
15. Angle(A, B, D) → ε
16. Line(B, l) → a
17. OrthogonalLine(A, l) → b
18. Intersect(a, b) → E
19. OrthogonalLine(D, l) → c
20. Intersect(a, c) → F
21. Segment(A, B) → f
22. Line(D, f) → g
23. Intersect(a, g) → C
24. Segment(E, F) → h
25. Segment(B, C) → i
26. Segment(D, F) → m
27. Segment(A, E) → n
28. Segment(A, D) → p
29. Angle(F, D, A) → α
30. Angle(A, E, F) → β
31. Segment(D, C) → j
32. Polygon(A, E, F, D) → poly1, a_1, g_1, h_1, c_1
33. Polygon(A, B, C, D) → poly3, a_2, b_1, i_1, c_2
34. Segment(A, C) → q
35. Segment(B, D) → r
36. Intersect(q, r) → O
37. Segment(A, O) → s
38. Segment(O, C) → t
39. Segment(B, O) → d_1
40. Segment(O, D) → e_1
41. Angle(D, A, B) → δ
42. Angle(B, C, D) → ζ
43. Angle(A, B, C) → η
44. Angle(C, D, A) → θ
45. Point(f) → G
46. Point(j) → H