平行线双反射几何作图示例

GeoGebra 命令及参数

1. Vector(D, E) → u
2. Translate(pic1, u) → pic1'
3. Translate(B, u) → B'_{4}
4. Translate(C, u) → C'_{4}
5. Vector(B, B'_{4}) → v
6. Rotate(C, δ, A) → C'_1
7. CircleArc(A, C'_1, C) → c
8. CircleArc(A, C, C'_1) → d
9. Circle(A, C) → e
10. Dilate(pic1, k, A) → pic1'_3
11. Dilate(B, k, A) → B'_3
12. Dilate(C, k, A) → C'_3
13. Rotate(B, δ, A) → B'_1
14. Rotate(pic1, δ, A) → pic1'_1
15. Circle(A, C) → p
16. CircleArc(A, C'_1, C) → r
17. Textfield(δ) → InputBox1
18. Textfield(k) → InputBox2
19. Intersect(q, eq1) → H