线的等角共轭

GeoGebra 命令及参数

1. Line(A, B) → a
2. Line(B, C) → b
3. Line(C, A) → c
4. Circle(A, B, C) → d
5. Center(d) → O
6. OrthogonalLine(A, b) → l
7. OrthogonalLine(B, c) → m
8. Intersect(l, m) → H
9. Polygon(A, B, C) → poly1, c_1, a_1, b_1
10. Line(X, Y) → n
11. Point(n) → P
12. Mirror(P, a) → M'
13. Mirror(P, c) → M'_1
14. Mirror(P, b) → M'_2
15. Circle(M', M'_1, M'_2) → e
16. Center(e) → D
17. Locus(D, P) → loc1