public class Rectangle implements Measurable
{
  private double length;
  private double width;

  public Rectangle(double l, double w)
    {
      length = l;
      width = w;
    }

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

  public double perimeterMeasure()
    {
      return (2*width + 2*length);
    }

  public void setWidth(double newWidth)
    {
      width = newWidth;
    }

  public void setHeight(double newLength)
    {
      length = newLength;
    }
}