Function volHemisphere

Maths/Volume.js:110–113

(radius)

  return (2 * PI * radius^3)/3
*/
const volHemisphere = (radius) => {
  isNumber(radius, 'Radius')
  return (2.0 * Math.PI * radius ** 3) / 3.0
}

const isNumber = (number, noName = 'number') => {
  if (typeof number !== 'number') {