线段的相似变换 by John Williams

GeoGebra 命令及参数

1. Line(B, C) → m
2. Dilate(m, k, A) → m'
3. Intersect(m, t) → O
4. Line(A, C) → f
5. Circle(C, 2) → g
6. Intersect(m', f) → E
7. Circle(E, 2) → h
8. Intersect(g, m, 2) → F
9. Intersect(g, f, 2) → G
10. Intersect(h, m', 2) → H
11. Intersect(h, f, 2) → I
12. Intersect(g, m, 1) → J
13. Intersect(g, f, 1) → K
14. CircleSector(C, F, G) → q
15. Angle(F, C, G) → α
16. Angle(J, C, G) → β
17. CircleSector(C, J, G) → c
18. Intersect(h, m', 1) → N
19. Dilate(C, 1 - i, E) → C'
20. Vector(C, C') → u
21. Translate(q, u) → q'
22. Translate(c, u) → c'
23. Circle(A, 2) → e