/**
 * A very simple extension of the Measurable interface.
 *
 * @see Measurable.java
 *
 * @author Mark Young (A00000000)
 */
public interface Polygonal 
    // all Polygons are Measurable (and so have all the Measurable methods)
    extends Measurable {

    // and they also have a method to...
    /** 
     * Get the number of sides this object has. 
     *
     * @return the number of sides this object has
     */
    public int getNumberOfSides();

}