package Examen;

public class Circulo implements Figura {
    protected double R;
    
    Circulo(double unR) {
        R = unR >=0 ?  unR : 0;
    }

    public double perimetro() {
        return 2.0*Math.PI*R;
    }

    public double Area() {
        return Math.PI*R*R;
    }

    public double Volumen() {
        System.out.println("No existe el volumen de un Circulo");
        return 0;
    }
}