Function triangleP

triangleP(a: number, b: number, c: number): number
Calculates the perimeter of a triangle.
Parameters
- a: number
  The first side length
- b: number
  The second side length
- c: number
  The third side length
Returns number
Example
```
// Returns 22
const perimeter = Chalkboard.geom.triangleP(10, 7, 5);
```
- Defined in Chalkboard.geom.ts:496