Perimeter.java

packagecom.thealgorithms.maths;

// Perimeter of different 2D geometrical shapes
publicfinalclassPerimeter {
privatePerimeter() {
 }

/**
 * Calculate the Perimeter of regular polygon (equals sides)
 * Examples of regular polygon are Equilateral Triangle, Square, Regular Pentagon, Regular
 * Hexagon.
 *
 * @param n for number of sides.
 * @param side for length of each side.
 * @return Perimeter of given polygon
 */
publicstaticfloatperimeterRegularPolygon(intn, floatside) {
returnn * side;
 }

/**
 * Calculate the Perimeter of irregular polygon (unequals sides)
 * Examples of irregular polygon are scalent triangle, irregular quadrilateral, irregular
 * Pentagon, irregular Hexagon.
 *
 * @param side1 for length of side 1
 * @param side2 for length of side 2
 * @param side3 for length of side 3
 * @param sides for length of remaining sides
 * @return Perimeter of given trapezoid.
 */
publicstaticfloatperimeterIrregularPolygon(floatside1, floatside2, floatside3, float... sides) {
floatperimeter = side1 + side2 + side3;
for (floatside : sides) {
perimeter += side;
 }
returnperimeter;
 }

/**
 * Calculate the Perimeter of rectangle
 *
 * @param length for length of rectangle
 * @param breadth for breadth of rectangle
 * @return Perimeter of given rectangle
 */
publicstaticfloatperimeterRectangle(floatlength, floatbreadth) {
return2 * (length + breadth);
 }

/**
 * Calculate the Perimeter or Circumference of circle.
 *
 * @param r for radius of circle.
 * @return circumference of given circle.
 */
publicstaticdoubleperimeterCircle(floatr) {
return2 * Math.PI * r;
 }
}