3.10 Point Inside the Circle and Outside of Rectangle

// Write an expression that checks for given point (x, y) if it is within the circle K({1, 1}, 1.5) and out of the rectangle R(top=1, left=-1, width=6, height=2).

namespace _10.PointInsideCircleButOutsideOfRectangle
{
    using System;

    public class PointInsideCircleButOutsideOfRectangle
    {
        private const double CenterX = 1d;
        private const double CenterY = 1d;
        private const double Radius = 1.5d;
        private const double PointXOnLeftTopAngle = -1d;
        private const double PointYOnLeftTopAngle = 1d;
        private const double WidthRect = 6d;
        private const double HeightRect = 2d;

        public static void Main(string[] args)
        {
            checked
            {
                Console.Write("Enter value to X of given point: ");
                double pointX = double.Parse(Console.ReadLine());
                Console.Write("Enter value to Y of given point: ");
                double pointY = double.Parse(Console.ReadLine());

                bool pointIsInsideCircle = CheckGivenPointIsInsideTheCircle(pointX, pointY);
                bool pointIsOutsideOfRectangle = CheckGivenPointIsOutsideOfTheRectangle(pointX, pointY);
                bool pointIsInsideCircleButIsOutsideRectangle = pointIsInsideCircle && pointIsOutsideOfRectangle;

                Console.WriteLine("Given point is Inside the Circle, but is Outside of the Rectangle: {0} !", pointIsInsideCircleButIsOutsideRectangle);
            }
        }

        private static bool CheckGivenPointIsOutsideOfTheRectangle(double pointX, double pointY)
        {
            bool isOutside = false;
            if (pointX < PointXOnLeftTopAngle || pointX > PointXOnLeftTopAngle + WidthRect)
            {
                isOutside = true;
            }
            else if (pointY < PointYOnLeftTopAngle - HeightRect || pointY > PointYOnLeftTopAngle)
            {
                isOutside = true;
            }

            return isOutside;
        }

        private static bool CheckGivenPointIsInsideTheCircle(double pointX, double pointY)
        {
            // Here will use Gauss circle equation: (x-a)^2 + (y-b)^2 <= r^2 :
            bool isInside = true;
            double squareDiffX = (pointX - CenterX) * (pointX - CenterX);
            double squareDiffY = (pointY - CenterY) * (pointY - CenterY);
            double sqrtResult = Math.Sqrt(squareDiffX + squareDiffY);
            if (sqrtResult > Radius)
            {
                isInside = false;
            }

            return isInside;
        }
    }
}