using System;

public class Program

{

    public static void Main()

    {

        //calculator

        Console.WriteLine("please enter first number to add");

        int addNumber1=int.Parse(Console.ReadLine());

        Console.WriteLine("please enter second number to add");

        int addNumber2=int.Parse(Console.ReadLine());

        int result = addNumber1 + addNumber2;

        Console.Write("the result is: ", result);

        //information form

        Console.WriteLine("please enter name");

        string Name=Console.ReadLine();

        Console.WriteLine("please enter age");

        string age=Console.ReadLine();

        Console.WriteLine("please enter city");

        string city=Console.ReadLine();

        Console.Write("your name is ",Name," you are ", age, " years old and live in ", city);

        //area calculator

        Console.WriteLine("please enter width");

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

        Console.WriteLine("please enter length");

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

        float area = length * width;

        Console.Write("the area is: ", area);

        //average calculator

        Console.WriteLine("please enter first number to average");

        float averageNumber1=float.Parse(Console.ReadLine());

        Console.WriteLine("please enter second number to average");

        float averageNumber2=float.Parse(Console.ReadLine());

        Console.WriteLine("please enter third number to average");

        float averageNumber3=float.Parse(Console.ReadLine());

        float average = ((averageNumber1 + averageNumber2 + averageNumber3)/3);

        Console.Write("the average of ", averageNumber1, " , ", averageNumber2, " and ", averageNumber3, "is: ", average);

        //pythagoras theorem

        Console.WriteLine("please enter length");

        double pylength=double.Parse(Console.ReadLine());

        Console.WriteLine("please enter width");

        double pywidth=double.Parse(Console.ReadLine());

        double hypotoneuse=Math.Sqrt(pylength*pylength+pywidth*pywidth);

        Console.Write("the hypotoneuse: ", hypotoneuse);

    }

}