风筝形探索 by ldollar

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Circle(C, B) → d
3. Intersect(c, d, 2) → D
4. Polygon(A, B, C, D) → poly1, a, b, c_1, d_1
5. Angle(poly1) → α, β, γ, δ
6. Perimeter(poly1) → perimeterpoly1
7. PointIn(poly1) → Pointpoly1
8. Segment(B, D) → f
9. Segment(A, C) → g
10. Intersect(f, g) → E
11. Angle(g, f) → ε
12. Angle(E, D, A) → ζ
13. Angle(E, B, A) → η
14. Angle(E, D, C) → θ
15. Angle(E, B, C) → ι
16. Angle(D, A, E) → κ
17. Angle(B, A, E) → λ
18. Angle(D, C, A) → μ
19. Angle(B, C, A) → ν