复角公式矩形

GeoGebra 命令及参数

1. Line(B, xAxis) → a
2. Line(A, xAxis) → b
3. Line(A, yAxis) → c
4. Line(B, yAxis) → d
5. Intersect(b, d) → C
6. Intersect(a, c) → D
7. Polygon(A, D, B, C) → poly1, a_1, d_1, b_1, c_1
8. Point(poly1) → E
9. Segment(A, E) → e
10. OrthogonalLine(E, e) → f
11. Intersect(f, d_1) → F
12. Segment(E, F) → g
13. Segment(F, A) → h
14. Angle(F, E, A) → θ
15. Angle(A, D, B) → ϕ
16. Angle(B, C, A) → γ
17. Angle(D, B, C) → δ
18. Angle(C, A, E) → α
19. Angle(E, A, F) → β
20. Angle(F, A, D) → ε
21. Angle(D, F, A) → ζ
22. Angle(A, E, C) → η
23. Angle(B, E, F) → ι
24. Midpoint(A, E) → G
25. Midpoint(F, E) → H
26. Midpoint(A, F) → I
27. Midpoint(A, C) → J
28. Midpoint(E, C) → K
29. Midpoint(B, E) → L
30. Midpoint(F, B) → M
31. Midpoint(D, F) → N
32. Midpoint(D, A) → O
33. Polygon(F, A, E) → poly2, e_1, f_1, a_2