风筝图形的性质探究

GeoGebra 命令及参数

1. Segment(A, C) → a
2. OrthogonalLine(B, a) → b
3. Mirror(B, a) → D
4. Intersect(b, a) → X
5. Segment(A, X) → c
6. Segment(X, C) → d
7. Segment(B, X) → e
8. Segment(X, D) → f
9. Polygon(A, B, C, D) → poly1, a_1, b_1, c_1, d_1
10. Angle(A, X, D) → α
11. Angle(A, B, C) → β
12. Angle(B, C, D) → γ
13. Angle(C, D, A) → δ
14. Angle(D, A, B) → ε
15. Angle(A, B, X) → ζ
16. Angle(X, B, C) → η
17. Angle(B, C, X) → θ
18. Angle(X, C, D) → ι
19. Angle(C, D, X) → κ
20. Angle(X, D, A) → λ
21. Angle(D, A, C) → μ
22. Angle(X, A, B) → ν