构造平行线 by kmso

GeoGebra 命令及参数

1. Line(A, B) → c_1
2. Segment(A, B) → a
3. Point(c_1) → D
4. Circle(D, r_1) → c
5. Line(C, D) → b
6. Circle(C, r_1) → d
7. Intersect(c, b, 1) → E
8. Intersect(c, c_1, 1) → F
9. Intersect(d, b, 1) → G
10. Circle(G, Segment[E, F]) → e
11. Intersect(d, e, 2) → H
12. Line(C, H) → f
13. Point(c) → I
14. Point(d) → J
15. Point(e) → K
16. Point(f) → L
17. Segment(I, D) → g
18. Segment(J, C) → h
19. Segment(E, F) → i
20. Segment(G, K) → j
21. Segment(E, D) → q
22. Segment(D, F) → r
23. Segment(F, E) → s
24. Segment(G, C) → t
25. Segment(C, H) → a_1
26. Segment(H, G) → b_1