using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Angelica Janeth De leon Mendiola");

        Console.WriteLine("--------------------------------");

            int sidea, sideb, sidec; 

    Console.Write("Check whether a triangle is Equilateral, Isosceles or Scalene:\n");

    Console.Write("Input side 1 of triangle: ");

    sidea= Convert.ToInt32(Console.ReadLine());

​

    Console.Write("Input side 2 of triangle: ");

    sideb= Convert.ToInt32(Console.ReadLine()); 

​

    Console.Write("Input side 3 of triangle: ");

    sidec= Convert.ToInt32(Console.ReadLine());  

    if(sidea==sideb && sideb==sidec) 

    {  

        Console.Write("This is an equilateral triangle.\n");  

    }  

    else if(sidea==sideb || sidea==sidec || sideb==sidec) 

    {  

        Console.Write("This is an isosceles triangle.\n");  

    }  

    else 

    {  

        Console.Write("This is a scalene triangle.\n");  

    }  

    }

}