等圆周角定理演示

GeoGebra 命令及参数

1. Point(yAxis) → O
2. Point(xAxis) → Z
3. Circle(O, Z) → c
4. Point(c) → A
5. Point(c) → B
6. Segment(A, B) → a
7. Point(c) → D
8. Circle(D, a) → d
9. Intersect(c, d) → F, C, ,
10. Segment(C, D) → b
11. Segment(B, O) → e
12. Segment(A, O) → f
13. Segment(C, O) → g
14. Segment(D, O) → h
15. Angle(B, O, A) → α
16. Angle(C, O, D) → β
17. CircleArc(O, B, A) → k
18. CircleArc(O, C, D) → p
19. Intersect(e, f) → E
20. CircleArc(E, B, A) → q
21. CircleArc(E, C, D) → r
22. Angle(B, E, A) → γ
23. Angle(C, E, D) → δ