圆中的反射几何

GeoGebra 命令及参数

1. Polygon(F, G, H, I, J, K, L, M, N, O_{1}) → poly1, f_1, o, g_1, h_1, i_1, j_1, k_1, l_1, m, n
2. Circle(O, 3) → c
3. Point(poly1) → B
4. Mirror(B, c) → C
5. Segment(O, C) → f
6. OrthogonalLine(B, f) → g
7. Intersect(c, g, 2) → A
8. Segment(O, A) → h
9. Intersect(c, g, 1) → E
10. Segment(O, E) → i
11. Segment(A, C) → j
12. Segment(E, C) → k
13. Segment(A, B) → l
14. Angle(C, B, A) → α
15. Angle(O, A, C) → β
16. Locus(C, B) → loc1