筝形的性质 by sgiannakopoulos2020

GeoGebra 命令及参数

1. Circle(A, B') → c
2. Segment(A, B') → f
3. Circle(A, C_1) → d
4. Segment(A, C_1) → g
5. Segment(C_1, B') → h
6. Mirror(A, h) → A'
7. Mirror(C_1, h) → C'
8. Segment(A', C') → g'
9. Mirror(A, h) → A'_1
10. Mirror(B', h) → B'_1
11. Segment(A'_1, B'_1) → f'
12. Mirror(C_1, g) → C'_1
13. Mirror(B', f) → B'_2
14. Mirror(C_1, g) → C'_2
15. Angle(A, B', A') → α
16. Angle(B', A', C_1) → β
17. Angle(A', C_1, A) → γ
18. Angle(C_1, A, B') → δ
19. Segment(A, A') → i
20. Segment(B', C_1) → j
21. Intersect(i, j) → D
22. Angle(B', D, A) → ε
23. Angle(A', D, B') → ζ
24. Distance(A, D) → distanceAD
25. Midpoint(A, D) →
26. Distance(D, A') → distanceDA'
27. Midpoint(D, A') →
28. Distance(B', D) → distanceBD
29. Midpoint(B', D) →
30. Distance(D, C_1) → distanceDC1
31. Midpoint(D, C_1) →