Answers for "(2) Program to find area of an equilateral triangle"

area of equilateral triangle in java

import java.util.Scanner;
public class AreaOfEquilateral
{
   public static void main(String[] args)
   {
      Scanner sc = new Scanner(System.in);
      System.out.println("Please enter the side of equilateral triangle: ");
      double side = sc.nextDouble();
      double area = (Math.sqrt(3)/4) * (side * side);
      System.out.println("Area of equilateral triangle is: " + area);
      sc.close();
   }
}