Pyramid.js

/**
 * This class represents a regular pyramid and can calculate its volume and surface area
 * https://en.wikipedia.org/wiki/Pyramid_(geometry)
 * @constructor
 * @param {number} bsl - The side length of the base of the pyramid.
 * @param {number} height - The height of the pyramid
 */
export default class Pyramid {
 constructor(bsl, height) {
 this.bsl = bsl
 this.height = height
 }

 baseArea = () => {
 return Math.pow(this.bsl, 2)
 }

 volume = () => {
 return (this.baseArea() * this.height) / 3
 }

 surfaceArea = () => {
 return (
 this.baseArea() +
 ((this.bsl * 4) / 2) *
 Math.sqrt(Math.pow(this.bsl / 2, 2) + Math.pow(this.height, 2))
 )
 }
}