几何作图：利用树状图与圆探索几何关系

GeoGebra 命令及参数

1. Segment(A, B) → f
2. Segment(C, D) → g
3. Segment(D, E) → h
4. Line(E, D) → i
5. Point(i) → F
6. AngleMoverCW(C, D, E, A, B) → j, k
7. Point(j) → G
8. Line(G, A) → l
9. OrthogonalLine(A, j) → m
10. LineBisector(B, A) → n
11. Intersect(m, n) → H
12. Circle(H, A) → c
13. Point(c) → I
14. Segment(A, I) → p
15. Segment(B, I) → q
16. Angle(G, A, B) → α
17. Angle(E, D, C) → β
18. Angle(A, I, B) → γ
19. Point(c) → J
20. Segment(B, J) → r
21. Segment(A, J) → s
22. Angle(C, D, F) → δ
23. Angle(B, J, A) → ε
24. Segment(F, E) → t