using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;



namespace ConsoleApplication1
{
    class Program
    {
        public class konty
        {

            public int a;
            public int b;
            public int c;

                public konty(int bok)
            {
                a = b = c = bok;

            }

        public konty(int _a, int _b, int _c)
        {
            a = _a;
            b = _b;
            c = _c;
        }

            public int obw()
            {
            return  a + b + c;
            }

            public double pole()
            {
                int p = this.obw() / 2;
                return Math.Sqrt(p * (p - a) * (p - b) * (p - c));
            }
}


        static void Main(string[] args)
        {
            konty kont = new konty(5);
            konty prost = new konty(2, 1, 2);

            Console.WriteLine("\nPierwszy = " + kont.obw() + " pole = " + kont.pole());
            Console.WriteLine("Drugi = " + prost.obw() + " pole = " + prost.pole());


            Console.ReadKey();
        }
    }
}