切圆定理3演示

GeoGebra 命令及参数

1. Circle(A_1, B_1) → c
2. Tangent(B, c) → f, g
3. Point(c) → D
4. Line(B, D) → h
5. Intersect(c, g, 1) → A
6. Intersect(c, h, 2) → C
7. Segment(B, A) → i
8. Segment(B, C) → j
9. Segment(C, D) → k
10. Segment(B, D) → l
11. Polygon(B, A, C) → t2, c_1, b_2, a_2
12. Segment(B, C) → m
13. Segment(B, A) → n
14. Segment(C, A) → p
15. Segment(A, D) → q
16. Angle(A, D, C) → β
17. Angle(A, C, B) → γ
18. Angle(C, B, A) → δ