筝形的性质 by Matthew Zeigler

GeoGebra 命令及参数

1. Line(A, B) → a
2. Segment(A, B) → b
3. Point(b) → C_1
4. OrthogonalLine(C_1, b) → c
5. Point(c) → D
6. Circle(A, D) → d
7. Intersect(d, c, 2) → C
8. Polygon(A, D, B, C) → poly1, a_1, d_1, b_1, e
9. Segment(A, B) → AB
10. Segment(D, C) → DC
11. Intersect(AB, DC) → E
12. Segment(E, D) → ED
13. Segment(E, B) → EB
14. Segment(E, C) → EC
15. Segment(E, A) → EA
16. Segment(A, D) → AD
17. Segment(D, B) → DB
18. Segment(B, C) → BC
19. Segment(C, A) → CA
20. Segment(D, C) → i
21. Segment(A, B) → j
22. Angle(i, j) → α
23. Angle(poly1) → β, γ, δ, ε
24. Segment(B, A) → m
25. Segment(C, D) → n
26. Angle(D, A, B) → ζ
27. Angle(B, A, C) → η
28. Angle(A, C, D) → θ
29. Angle(D, C, B) → ι
30. Angle(C, B, A) → κ
31. Angle(A, B, D) → λ
32. Angle(B, D, C) → μ
33. Angle(C, D, A) → ν
34. Point(m) → F
35. Point(n) → G
36. Line(F, G) → p
37. Point(m) → H
38. Line(G, H) → q
39. Point(n) → I
40. Line(H, I) → r
41. Line(I, F) → s
42. Polygon(J, K, L, M) → poly2, j_1, k_1, l_1, m_1