Function polygonP

polygonP(n: number, s: number): number
Calculates the perimeter of a regular polygon.
Parameters
- n: number
  The number of sides
- s: number
  The side length
Returns number
Example
```
// Returns 40
const perimeter = Chalkboard.geom.polygonP(4, 10);
```
- Defined in Chalkboard.geom.ts:301