风筝形性质演示

GeoGebra 命令及参数

1. Circle(A, B_1) → c
2. Circle(C, D_1) → d
3. Intersect(c, d, 1) → D
4. Intersect(c, d, 2) → B
5. Segment(D, C) → a
6. Segment(C, B) → b
7. Segment(D, A) → e
8. Segment(A, B) → f
9. Midpoint(B, D) → E
10. Segment(B, E) → g
11. Segment(E, D) → h
12. Segment(E, A) → i
13. Segment(E, C) → j
14. Angle(C, B, E) → α
15. Angle(E, B, A) → β
16. Angle(B, A, E) → γ
17. Angle(E, A, D) → δ
18. Angle(A, D, E) → ε
19. Angle(E, D, C) → ζ
20. Angle(D, C, E) → η
21. Angle(E, C, B) → θ
22. Angle(D, E, A) → ι
23. Angle(B, A, D) → κ
24. Angle(C, B, A) → λ
25. Angle(A, D, C) → μ
26. Angle(D, C, B) → ν
27. Polygon(A, B, C) → poly1, c_1, a_1, b_1
28. Mirror(A, i) → A'
29. Mirror(B, i) → B'
30. Mirror(C, i) → C'
31. Polygon(A', B', C') → poly1', c', a', b'
32. Polygon(A, B, D) → poly2, d_1, a_2, b_2
33. Mirror(A, g) → A'_1
34. Mirror(B, g) → B'_1
35. Mirror(D, g) → D'
36. Polygon(A'_1, B'_1, D') → poly2', d', a'_1, b'_1