平行线构造 by Caribou Contests

GeoGebra 命令及参数

1. Line(sdfdsf, afdfgfs) → a
2. Line(sfdgsdfg, dfgsdfg) → b
3. Circle(A, Segment[A, C]) → circle1
4. Circle(C, Segment[A, C]) → circle2
5. Intersect(circle1, circle2, 1) → D_2
6. Line(A, C) → c
7. Circle(B, A) → circle3
8. Intersect(circle1, circle3, 2) → D_1
9. Intersect(circle1, circle2, 1) → E_1
10. Segment(D_1, E_1) → zAnswer
11. Circle(A, Segment[B, A]) → d
12. Circle(C, Segment[A, C]) → e
13. Circle(B, Segment[A, C]) → f
14. Intersect(d, f, 2) → D
15. Intersect(d, e, 1) → E
16. Segment(D, E) → g
17. Polygon(D, B, A) → poly1, a_1, d_1, b_1
18. Polygon(A, C, E) → poly2, e_1, a_2, c_1