using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace ConsoleApplication1

{

class AreaCalculator

{

public float width, height, radius, hieght, length;

static void Main(string[] args)

{

AreaCalculator a = new AreaCalculator();

a.Rectangle();

a.Circle();

a.RightTriangle();

Console.ReadKey();

}

public void Rectangle()

{

Console.WriteLine(“Area of a Rectangle : “);

Console.WriteLine(“What is the Width for Rectangle? “);

width = float.Parse(Console.ReadLine());

Console.WriteLine(“What is the height for Rectangle? “);

height = float.Parse(Console.ReadLine());

System.Threading.Thread.Sleep(2000);

Console.WriteLine(“The area of rectangle is :{0}”, width * height);

}

public void Circle()

{

Console.WriteLine(“Area of a Circle : “);

Console.WriteLine(“What is the Radius of the Circle? “);

radius = float.Parse(Console.ReadLine());

System.Threading.Thread.Sleep(2000);

Console.WriteLine(“The area of Circle is:{0}”, 3.14159265359 * radius * radius);

}

public void RightTriangle()

{

Console.WriteLine(“Area of a Right Triangle : “);

Console.WriteLine(“What is the Height for RightTriangle? “);

hieght = float.Parse(Console.ReadLine());

Console.WriteLine(“Enter the Length for RightTriangle? “);

length = float.Parse(Console.ReadLine());

System.Threading.Thread.Sleep(2000);

Console.WriteLine(“The area of RightTriangle is:{0}”, (length * hieght) / 2);

}

}

}

Output :-

Area of a Rectangle :

What is the Width for Rectangle? 2.5

What is the height for Rectangle? 4.5

The area of rectangle is :11.25

Area of a Circle :

What is the Radius of the Circle? 3

The area of Circle is:28.27433388231

Area of a Right Triangle :

What is the Height for RightTriangle? 16

Enter the Length for RightTriangle? 6

The area of RightTriangle is:48