public abstract class Shape {
double area = 0;
double perimeter = 0;
int sides=0;
public Shape()
{
	
}
public Shape(int s)
{
	sides = s;
}
public int getSides()
{
	return sides;
}
public void setSides(int s)
{
	sides = s;
}
public abstract double calculateArea();
public abstract double calculatePerimeter();

}