using System;

public class Program

{

    public static void Main()

    {

        double a,b,c,d,e;

        Console.WriteLine("ادخل طول الضلع الاول");

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

        Console.WriteLine("ادخل طول الضلع الثاني");

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

        c=Math.Pow(a,2)+Math.Pow(b,2);

        c=Math.Sqrt(c);

        d=a+b+c;

        e=a*b/2;

        Console.WriteLine("the length of the first edge= {0},the length of the second edge= {1},the length of the third edge= {2},the perimeter= {3},the area= {4}",a,b,c,d,e);

    }

}