Cusanusπ近似：圆内接多边形逼近法

GeoGebra 命令及参数

1. Polygon(A, B, 4) → Vieleck1, a, b, c, d, C_1, D_1
2. Circle(A, B, C_1) → e
3. Center(e) → M
4. LineBisector(a) → f
5. Intersect(e, f, 1) → C_2
6. Segment(A, C_2) → g
7. Segment(C_2, B) → h
8. Intersect(f, a) → G
9. Circle(M, G) → k
10. Midpoint(g) → H
11. Midpoint(h) → D
12. Segment(H, D) → i
13. Segment(M, A) → j
14. Segment(M, B) → l
15. Segment(M, C_2) → m
16. Segment(M, D) → n_{1}
17. Segment(M, H) → p
18. Intersect(i, m) → C
19. Circle(M, C) → q
20. Circle(M, D) → r
21. Intersect(k, b, 1) → E
22. Segment(M, E) → s
23. Segment(M, C) → t
24. Circumference(q) → umfangq
25. PointIn(q) → Punktq_{1}
26. Circumference(r) → umfangr
27. PointIn(r) → Punktr
28. Circumference(k) → umfangk
29. PointIn(k) → Punktk_{1}
30. Circumference(q) → o
31. PointIn(q) → Punktq
32. Circumference(k) → u
33. PointIn(k) → Punktk