平行线动态作图

GeoGebra 命令及参数

1. Line(A, B) → d
2. Point(d) → D
3. Circle(D, C) → c
4. Intersect(c, d) → E_1, E
5. Circle(E, D) → e
6. Circle(C, D) → f
7. Intersect(e, f) → D_2, F, ,
8. Rotate(C, (s1 * t), D) → C'
9. CircleArc(D, C, C') → h
10. Rotate(D, (s2 * t), E) → D'
11. CircleArc(E, D, D') → k
12. Rotate(D, (s3 * t), C) → D''
13. CircleArc(C, D, D'') → p
14. Vector(P, Q) → v
15. Translate(P, Vector[(s4 * v)]) → P'
16. Segment(P, P') → g