Exercise13.java

	public class Exercise13 {
 public static void main(String arg[]) {
 // Write a program that computes the area of a polygon, where the
 // number of sides and the length of the side is input by the user. The
 // number of sides is an integer, but the length can be a decimal number.
 // The formula is:
 // N times the square of the side length, divided by 4*K,
 // where K is equal to tan(pi/N),
 // and N is the number of sides entered by the user.
 // Hint: The Math library has a function for computing tan(x), i.e. tangent.
 
 // Add your code here, then click "run" to test it.

 }
 }