import { degreeToRadian } from './DegreeToRadian.js'

/**
 * @function circularArcLength
 * @description calculate the length of a circular arc
 * @param {Integer} radius
 * @param {Integer} degrees
 * @returns {Integer} radius * angle_in_radians
 * @see https://en.wikipedia.org/wiki/Circular_arc
 * @example circularArcLength(3, 45) = 2.356194490192345
 */
function circularArcLength(radius, degrees) {
  return radius * degreeToRadian(degrees)
}
/**
 * @function circularArcArea
 * @description calculate the area of the sector formed by an arc
 * @param {Integer} radius
 * @param {Integer} degrees
 * @returns {Integer} 0.5 * r * r * angle_in_radians
 * @see https://en.wikipedia.org/wiki/Circular_arc
 * @example circularArcArea(3,45) = 3.5342917352885173
 */
function circularArcArea(radius, degrees) {
  return (Math.pow(radius, 2) * degreeToRadian(degrees)) / 2
}

export { circularArcLength, circularArcArea }