import java.util.Scanner;
class AreaOfEquilateralTriangle
{
public static void main(String args[])
{
Scanner s = new Scanner(System.in);
System.out.println("Enter the side of the Equilateral Triangle:");
double a= s.nextDouble();
double area=(Math.sqrt(3)/4)*(a*a);
System.out.println("Area of Equilateral Triangle is: " + area);
}
}Output:
Enter the side of the Equilateral Triangle:
5
Area of Equilateral Triangle is: 10.825317