AutoCAD 2008 User's
Guide > Create and Modify
Objects > Draw Geometric
Objects > Create and Combine
Areas (Regions) >
Create and Combine Areas (Regions)
Creates a region or a polyline from an enclosed area
Creates composite solids or regions from the intersection of two or more solids or regions and removes the areas outside of the intersection
Calculates the mass properties of regions or solids
Converts an object that encloses an area into a region object
Combines selected regions or solids by subtraction
Combines selected regions or solids by addition
