using System;

public class Program

{

    class PerimetroC

    {

        private double x1;

        private double y1;

        private double x2;

        private double y2;

        private double x3;

        private double y3;

        private double x4;

        private double y4;

        private double rab;

        private double rbc;

        private double rcd;

        private double rda;

        public void PD()

{

            Console.WriteLine("Teclea el valor de x1 ");

            x1=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de y1 ");

            y1=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de x2 ");

            x2=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de y2 ");

            y2=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de x3 ");

            x3=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de y3 ");

            y3=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de x4 ");

            x4=double.Parse(Console.ReadLine());

            Console.WriteLine("Teclea el valor de y4 ");

            y4=double.Parse(Console.ReadLine());

}

​

        public double procesoAB()

        {

            double resy, resx, muly, mulx, sumaxy, reab;

            resx = x2-x1;

            resy = y2-y1;

            mulx = resx*resx;

            muly = resy*resy;

            sumaxy = mulx + muly;

            reab =Math.Sqrt(sumaxy); 

​

            return reab;

        }

        public double procesoBC()

        {

            double resy, resx, muly, mulx, sumaxy, rebc;

            resx = x3-x2;

            resy = y3-y2;

            mulx = resx*resx;

            muly = resy*resy;

            sumaxy = mulx + muly;

            rebc =Math.Sqrt(sumaxy); 

​

            return rebc;

        }

        public double procesoCD()

        {

            double resy, resx, muly, mulx, sumaxy, recd;

            resx = x4-x3;

            resy = y4-y3;

            mulx = resx*resx;

            muly = resy*resy;

            sumaxy = mulx + muly;

            recd =Math.Sqrt(sumaxy); 

            return recd;

        }

        public double procesoDA()

        {

            double resy, resx, muly, mulx, sumaxy, reda;

            resx = x4-x1;

            resy = y4-y1;

            mulx = resx*resx;

            muly = resy*resy;

            sumaxy = mulx + muly;

            reda =Math.Sqrt(sumaxy); 

            return reda;

        }

    }

    public static void Main()

    {

        PerimetroC c= new PerimetroC();

        double reab;

        double rebc;

        double recd;

        double reda;

        double suma;

        c.PD();

        reab = c.procesoAB();

        rebc = c.procesoBC();

        recd = c.procesoCD();

        reda = c.procesoDA();

        suma = reab+rebc+recd+reda;

        Console.WriteLine("El perimetro es: " + suma);

    }

}