平行四边形中矩形形成过程演示

GeoGebra 命令及参数

1. Line(A, D) → a
2. Line(C_1, a) → b
3. Point(b) → C
4. Segment(D, C) → c
5. Line(A, c) → d
6. Intersect(b, d) → B
7. Segment(C, B) → e
8. Segment(B, A) → f
9. Segment(A, D) → g
10. AngularBisector(e, c) → h, i
11. AngularBisector(e, f) → j, k
12. AngularBisector(f, g) → l, m
13. AngularBisector(g, c) → n, p
14. Intersect(k, g) → F
15. Intersect(i, g) → G
16. Intersect(m, e) → H
17. Intersect(p, e) → I
18. Segment(D, I) → q
19. Segment(A, H) → r
20. Segment(B, F) → s
21. Segment(C, G) → t
22. Intersect(r, q) → J
23. Intersect(r, s) → K
24. Intersect(s, t) → L
25. Intersect(q, t) → M
26. Angle(q, t) → α
27. Angle(r, q) → β
28. Angle(s, r) → γ
29. Angle(t, s) → δ
30. Segment(K, M) → a_1
31. Angle(D, A, H) → ε
32. Angle(H, A, B) → ζ
33. Angle(A, B, F) → η
34. Angle(F, B, C) → θ
35. Angle(B, C, G) → ι
36. Angle(G, C, D) → κ
37. Angle(C, D, I) → λ
38. Angle(I, D, A) → μ
39. LaTeX(a_1, true, true) → text1
40. Length(e) → o
41. Length(f) → u
42. LaTeX(v, true, true) → text2