interface girth1 {
	abstract double girth(double x, double y, double x1, double y1, double x2,
			double y2);
}

interface girth2 {
	abstract double girth(double x);
}

interface girth3 {
	abstract double girth(double h,double l);
}

public class mulgirth implements girth1,girth2,girth3 {
	public double girth(double x, double y, double x1, double y1, double x2,
			double y2) {
		double i = (x - x1) * (x - x1) + (y - y1) * (y - y1);
		double j = (x2 - x1) * (x2 - x1) + (y2 - y1) * (y2 - y1);
		double k = (x - x2) * (x - x2) + (y - y2) * (y - y2);
		double g = Math.sqrt(i) + Math.sqrt(j) + Math.sqrt(k);
		return g;
	}

	public double girth(double r)
	{
		return Math.PI*2*r;
	}

	public double girth(double l, double h) {
		return 2 * (h+l);
	}

}