package  
  {
      public interface @ax-actionscript-book-GeometricShapes-com-example-programmingas3-geometricshapes-IPolygon extends actionscript_book_GeometricShapes_com_example_programmingas3_geometricshapes_IGeometricShape 
      {
                  function getPerimeter():Number;
                  function getSumOfAngles():Number;
      }
  }