菱形与筝形几何性质及反射变换演示

GeoGebra 命令及参数

1. Segment(A, B) → a
2. Segment(A, C) → b
3. Line(C, a) → c
4. Line(B, b) → d
5. Intersect(c, d) → D
6. Segment(B, D) → e
7. Segment(D, C) → f
8. Segment(C, A) → g
9. Segment(A, B) → h
10. Angle(B, A, C) → α
11. Angle(C, D, B) → β
12. Angle(A, C, D) → γ
13. Angle(A, B, D) → δ
14. Line(A, D) → i
15. Line(B, C) → j
16. Intersect(i, j) → E
17. Segment(A, E) → k
18. Segment(E, D) → l
19. Segment(B, E) → m
20. Segment(E, C) → n
21. Angle(A, E, B) → ε
22. Angle(A, E, C) → ζ
23. Angle(D, E, C) → η
24. Angle(D, E, B) → θ