package InterfaceDemo;

/**
 * CrossSection.java
 *
 *
 * Created: Tue Feb 13 20:02:25 2001
 *
 * @author Stuart C. Shapiro
 *
 * The class of cross sections, i.e., planar figures.
 */

abstract public class CrossSection {
    /** Constructs a cross section. */
    public CrossSection (){
    }

    /** Returns the area of this cross section. */
    abstract public double getArea();
}// CrossSection