Enhance arcpy.Geometry with the properties regarding object type

[AlexMarkov]

Some geometries in ArcGIS are created like parametric elements (arcs, ellipses).

It should be able to get this information somehow from the properties of arcpy.Geometry, arcpy.Polyline, arcpy.Polygon classes.

[RichardFairhurst]

For performance reasons only coordinate values are actually readable from the arcpy.geometry operators.  Geoprocessing deals with the parametric elements, but not the arcpy geometry operators.  At the users conference the programmers said it had to do with optimizing online performance, which was a key design requirement for arcpy.  They recognized that you will screw up geometry if you use arcpy operations on parametric data, but offered no solution.