Chapter 4, Problem 4.4PE

(Geometry: area of a hexagon) The area of a hexagon can be computed using the following formula (s is the length of a side):

     $Area=\frac{6\times s^2}{4\times \tan \left(\frac{\pi }{6}\right)}$

Write a program that prompts the user to enter the side of a hexagon and displays its area. Here is a sample run:

Enter the side: 5.5 l-w»

The area of the hexagon is 78.59