探究筝形的性质

GeoGebra 命令及参数

1. Point(Circle[A, 2]) → B
2. Segment(A, B) → f
3. Point(Circle[A, 5]) → C
4. Segment(A, C) → g
5. Point(Circle[B, 2]) → D
6. Segment(B, D) → h
7. Distance(C, A) → distanceCA
8. Point(Circle[C, 5]) → E
9. Segment(C, E) → i
10. Distance(B, E) → distanceBE
11. Distance(A, B) → distanceAB
12. Distance(A, C) → distanceAC
13. Distance(E, C) → distanceEC
14. Angle(A, B, E) → α
15. Angle(E, C, A) → β
16. Angle(C, A, B) → γ
17. Rotate(B, 89.93°, E) → B'
18. Angle(B, E, B') → δ
19. Segment(B, C) → j
20. Segment(A, E) → k
21. Intersect(j, k) → F
22. Rotate(A, (-(90°)), F) → A'
23. Angle(A', F, A) → ε
24. Distance(A, F) → distanceAF
25. Distance(E, F) → distanceEF
26. Distance(B, F) → distanceBF
27. Distance(F, C) → distanceFC
28. Angle(E, C, F) → ζ
29. Angle(F, C, A) → η
30. Angle(A, B, F) → θ
31. Angle(F, B, E) → ι