1 public static double area(int n, double side){
2 double area = ( n*side*side)/4* Math.tan(3.14/n);
3 return area;
4 }
5 public static void main(String[] args) {
6 Scanner scan = new Scanner (System.in);
7 System.out.println("Enter n and side");
8 int n = scan.nextInt();
9 double side = scan.nextDouble();
10 System.out.println(area(n, side));
11
12}
13}