Class Kolo

using System;
using System.Collections.Generic;
using System.Text;

namespace Figury_polimorfizm
{
    class Kolo :  Figura
    {
        protected double r;

        public Kolo(double rr)
        {
            r = rr;
        }

        public override double Skaluj(double a)
        {
            return r *= a;
        }
        public override double Pole()
        {
            return 3.14 * r * r;
        }
        public override double Obwod()
        {
            return 2 * 3.14 * r;
        }
        public override void Wyswietl()
        {
            Console.WriteLine("Koło r = " + r);
        }
    }
}