using System;

public class Triangle

{

    public static void Main()

    {

        // ...

    }

    public static void triangleAreaFinder(double triangleBase, double triangleHeight)

    {

        // ...

    }

}

​

​

public class Rectangle

{

    public static void Main()

    {

        // ...

    }

    // The following method determines whether a rectangle is a square using the given length and width values.

    public static void rectangleSquareChecker(double length, double width)

    {

        // The following else statement will activate if rectangle is not a square.

        if (length == width)

        {

            Console.WriteLine("The rectangle is a square.");

        }

        // The following else statement will activate if rectangle is not a square. 

        else

        {

            Console.WriteLine("The rectangle is not a square.");

        }

    }

    // // The following method calculates the area of the rectangle using the given length and width values.

    public static void rectangleAreaFinder(double length, double width)

    {

        // The following line calculates and displays the area of the rectangle.

        Console.Write("The area of the rectangle is " + (length * width));

    }

}