/** Rectangle.java -- example of a 2-d shape
 *  We say that we are extending the Shape class, where the name attribute
 *  was declared.
 */
public class Rectangle extends Shape implements TwoD
{
  private double length;
  private double width;

  /** Notice that the first thing we do is call super(), which
   *  means we are calling our parent's constructor.
   */
  public Rectangle(String n, double l, double w)
  {
    super(n);
    length = l;
    width = w;
  }

  public double findArea()
  {
    return length * width;
  }
}