zad

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

namespace ConsoleApp11
{
    class Program
    {

        static void Main(string[] args)
        {
            Circle k1 = new Circle(0, 0, 7);
            Point p1 = new Point(0, 7);
            double d = Math.Sqrt((k1.X - p1.X) * (k1.X - p1.X) + (k1.Y - p1.Y) * (k1.Y - p1.Y));
            if (d < k1.R) Console.WriteLine("tochkata e v kruga");
            else if (d == k1.R) Console.WriteLine("tochkata e na okrujnostta");
            else Console.WriteLine("tochkata e izvun okrujnostta");
        }

    }
    class Point
    {
        private double x;

        public double X
        {
            get { return x; }
            set { x = value; }
        }
        private double y;

        public double Y
        {
            get { return y; }
            set { y = value; }
        }
        public Point(double x, double y)
        {
            this.x = x;
            this.y = y;
        }
    }
    class Circle : Point
    {
        private double r;

        public double R
        {
            get { return r; }
            set { r = value; }
        }

        public static double FormulaC(double r)
        {
            double c = 2 * r * Math.PI; return c;

        }
        public static double FormulaS(double r)
        {
            double s = r * r * Math.PI; return s;
        }

        public Circle(double x, double y, double r) : base(x, y)
        {
            this.r = r;


        }
    }
}