用最小公倍数（LCM）图解分数加法

GeoGebra 命令及参数

1. Circle(A, 2) → c
2. Circle(B, 2) → d
3. Point(c) → C
4. Segment(A, C) → f
5. Point(d) → D
6. Segment(B, D) → g
7. Sequence(Segment[A, Rotate[C, f°, A]], f, (360°) / b, 360, 360 / b) → l1
8. Sequence(Segment[B, Rotate[D, f°, B]], f, (360°) / n, 360, 360 / n) → l2
9. Circle(E, 2) → e
10. Rotate(C, (360° * a / b), A) → C'
11. Angle(C, A, C') → α
12. Rotate(D, (-((360° * m / n))), B) → D'
13. Angle(D', B, D) → β
14. CircleSector(A, C, C') → h
15. CircleSector(B, D', D) → k
16. LCM(b, n) → i
17. Textfield(a) → InputBox1
18. Textfield(b) → InputBox2
19. Textfield(m) → InputBox3
20. Textfield(n) → InputBox4
21. Point(e) → F
22. Segment(E, F) → t
23. Sequence(Segment[E, Rotate[F, t°, E]], t, (360°) / b, 360, 360 / b) → l3
24. Circle(G, 2) → c_1
25. Point(c_1) → H
26. Segment(G, H) → f_1
27. Sequence(Segment[G, Rotate[H, f°, G]], f, (360°) / n, 360, 360 / n) → l4
28. Rotate(F, (360° * a / b), E) → F'
29. Angle(F, E, F') → γ
30. Rotate(H, (-((360° * m / n))), G) → H'
31. Angle(H', G, H) → δ
32. CircleSector(E, F, F') → d_1
33. CircleSector(G, H', H) → e_1
34. LCM(as, ak) → v
35. Sequence((as * i), i, 1, 10) → l5
36. Sequence((ak * i), i, 1, 10) → l6