单位圆中的平均弦长

GeoGebra 命令及参数

1. Sequence(((random() * 2) * π), i, 1, g) → M_0
2. First(M_0, n) → M
3. Sequence(((random() * 2) * π), i, 1, g) → L_0
4. First(L_0, n) → L
5. Sequence(Rotate[D, Element[L, i]], i, 1, n) → L_1
6. Sequence(Rotate[D, Element[M, i]], i, 1, n) → L_2
7. Sequence(Segment[Element[L_1, i], Element[L_2, i]], i, 1, n) → L_3
8. Sum(Element[L_3, i], i, 1, n) → b
9. Circle((0, 0), 1) → d
10. Segment(A, D) → f