/**
 * @module functions
 */
/**
 * Calculate the circumference from the radius of a circle.
 * @param {number} radius The distance from the center of the circle to the circumference.
 * @returns {number} circumference Boundary measure of the circle or perimeter.
 */
export function circumferenceFromRadius(radius: number): number;
/**
 * Calculate the circumference from the diameter of a circle.
 * @param {number} diameter The line measure that passes through the centre of the circle
 * and touches the two points on the circumference.
 * @returns {number} circumference Boundary measure of the circle or perimeter.
 */
export function circumferenceFromDiameter(diameter: number): number;
/**
 * Calculate the radius from the circumference of a circle.
 * @param {number} circumference Boundary measure of the circle or perimeter.
 * @returns {number} radius The distance from the center of the circle to the circumference.
 */
export function radiusFromCircumference(circumference: number): number;
/**
 * Calculate the radius from the diameter of a circle.
 * @param {number} diameter The line measure that passes through the centre of the circle
 * and touches the two points on the circumference.
 * @returns {number} radius The distance from the center of the circle to the circumference.
 */
export function radiusFromDiameter(diameter: number): number;
/**
 * Calculate the diameter from the circumference of a circle.
 * @param {number} circumference Boundary measure of the circle or perimeter.
 * @returns {number} diameter The line measure that passes through the centre of the circle
 * and touches the two points on the circumference.
 */
export function diameterFromCircumference(circumference: number): number;
/**
 * Calculate the diameter from the radius of a circle.
 * @param {number} radius The distance from the center of the circle to the circumference.
 * @returns {number} diameter The line measure that passes through the centre of the circle
 * and touches the two points on the circumference.
 */
export function diameterFromRadius(radius: number): number;
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