Function trapezoidP

trapezoidP(a: number, b: number, c: number, d: number): number
Calculates the perimeter of a trapezoid.
Parameters
- a: number
  The first side length
- b: number
  The second side length
- c: number
  The third side length
- d: number
  The fourth side length
Returns number
Example
```
// Returns 24
const perimeter = Chalkboard.geom.trapezoidP(10, 7, 5, 2);
```
- Defined in Chalkboard.geom.ts:469