正多边形的周长

GeoGebra 命令及参数

1. Intersect(xAxis, yAxis) → A
2. Point(yAxis) → B
3. Dilate(A, radius + 1, B) → A'
4. Segment(A, A') → f
5. Rotate(A', (360 * ° / sides), A) → A''
6. Polygon(A', A'', sides) → Polygon, g, q, r, s, C, D, E, F, G, H, I, h, J, K, L, i, j, k, l, m, n, p
7. Circle(A, radius) → c
8. Perimeter(Polygon) → perimeterpoly1
9. PointIn(Polygon) → Pointpoly1_1
10. Perimeter(Polygon) → a
11. PointIn(Polygon) → Pointpoly1