using System;

namespace Assignment_Shape
{
    class Program
    {
        static void Main(string[] args)
        {

            var rectangle = new rectangle();
            Console.Write("Enter Rectangle's Height: ");
            double a = Convert.ToDouble(Console.ReadLine());
            Console.Write("Enter Rectangle's Width : ");           
            double b = Convert.ToDouble(Console.ReadLine());
            rectangle.Area(a,b);
            Console.WriteLine("The rectangle has an area of {0}", rectangle.area);
            Console.WriteLine();

            var square = new square();
            Console.Write("Enter Square's Height: ");
            double c = Convert.ToDouble(Console.ReadLine());
            square.Area(c);
            Console.WriteLine("The square has an area of {0}", square.area);
            Console.WriteLine();

            var triangle = new triangle();
            Console.Write("Enter Triangle's Height: ");
            double d = Convert.ToDouble(Console.ReadLine());
            Console.Write("Enter Triangle's Base  : ");
            double e = Convert.ToDouble(Console.ReadLine());
            triangle.Area(d, e);
            Console.WriteLine("The triangle has an area of {0}", triangle.area);
            Console.WriteLine();

            var rhombus = new rhombus();
            Console.Write("Enter Rhombus first Dimension : ");
            double f = Convert.ToDouble(Console.ReadLine());
            Console.Write("Enter Rhombus second Dimension: ");
            double g = Convert.ToDouble(Console.ReadLine());
            rhombus.Area(f, g);
            Console.WriteLine("The rhombus has an area of {0}", rhombus.area);
            Console.WriteLine();

            var pentagon = new pentagon();
            Console.Write("Enter Pentagon's Apothem : ");
            double h = Convert.ToDouble(Console.ReadLine());
            Console.Write("Enter Pentagon's Length  : ");
            double i = Convert.ToDouble(Console.ReadLine());
            pentagon.Area(h, g);
            Console.WriteLine("The pentagon has an area of {0}", pentagon.area);
            Console.WriteLine();

            var circle = new circle();
            Console.Write("Enter Circle's Radius : ");
            double j = Convert.ToDouble(Console.ReadLine());
            circle.Area(i);
            Console.WriteLine("The circle has an area of {0}", circle.area);


        }

    }
    class Shape
    {
        public double area { get; set; } 
    }
    class rectangle : Shape
    {
        // Return area of the rectangle.
        public void Area(double height, double width)
        {
            area = width * height;
        }
    }
    class square : Shape
    {
        // Return area of the square.
        public void Area(double side)
        {
            area = side * side;
        }
    }
    class triangle : Shape
    {
        // Return area of the triangle.
        public void Area(double height, double basetri)
        {
            area = (basetri * height)/2;
        }
    }
    class rhombus : Shape
    {
        // Return area of the rhombus.
        public void Area(double dimension1, double dimension2)
        {
            area = (dimension1 * dimension2)/2;
        }
    }
    class pentagon : Shape
    {
        // Return area of the pentagon.
        public void Area(double apothem, double length)
        {
            area = (5 * length * apothem) /2;
        }
    }
    class circle : Shape
    {
        // Return area of the circle.
        public void Area(double radius)
        {
            area = Math.PI * (radius * radius);
        }
    }
}