package  
{
    public interface actionscript_book_GeometricShapes_com_example_programmingas3_geometricshapes_IPolygon extends actionscript_book_GeometricShapes_com_example_programmingas3_geometricshapes_IGeometricShape 
    {
		function getPerimeter():Number;
		function getSumOfAngles():Number;
    }
}