Java Program To Find Area Of Isosceles Triangle

import java.util.Scanner;
public class demo1
{
   public static void main(String args[]) 
    {          
         Scanner input= new Scanner(System.in);       
         System.out.println("Enter the length of same sided");         
         double a= input.nextDouble();         
         System.out.println("Enter the side2 of the Triangle");         
         double b= input.nextDouble();
         double  area=(b/4)*Math.sqrt((4*a*a)-(b*b));      
         System.out.println("Area of Isosceles Triangle is: " + area);
   }
}