梯形与筝形的几何作图

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Line(C, f) → g
3. Line(A, C) → h
4. Point(g) → D
5. Line(B, D) → i
6. Angle(B, A, C) → α
7. Angle(C, D, B) → β
8. Angle(A, C, D) → γ
9. Angle(D, B, A) → δ