弦切角

GeoGebra 命令及参数

1. Circle(A, B) → c
2. Point(c) → C
3. Point(c) → D
4. Polygon(C, A, D) → poly1, d, c_1, a
5. Angle(C, A, D) → α
6. Point(c) → E
7. Segment(C, E) → b
8. Segment(E, D) → e
9. Angle(C, E, D) → β
10. CircleArc(A, C, D) → f
11. Point(c) → F
12. Segment(D, F) → g
13. Segment(F, C) → h
14. Angle(C, F, D) → δ
15. CircumcircleArc(D, E, C) → k
16. Circle(G, H) → p
17. Point(p) → I
18. Point(p) → J
19. Segment(I, J) → i
20. Point(p) → K
21. Segment(I, K) → j
22. Segment(K, J) → l
23. Segment(J, L) → m
24. Segment(L, I) → n
25. Angle(I, L, J) → ε
26. Angle(I, K, J) → ζ
27. Segment(C, D) → q