Function parallelogramP

parallelogramP(l: number, w: number): number
Calculates the perimeter of a parallelogram.
Parameters
- l: number
  The length
- w: number
  The width
Returns number
Example
```
// Returns 120
const perimeter = Chalkboard.geom.parallelogramP(50, 10);
```
- Defined in Chalkboard.geom.ts:274