Creating Regions in Autocad’s 2d workspace is a simple process and one of the many features we explore in our Autocad 2d classes. Regions are two-dimensional closed areas which can be combined from several different shapes. They are closed loops created from combinations of standard objects like lines, polylines, circles, arcs and splines. 

Regions can be used for applying hatching or shading or for analyzing properties like area, or extracting design information.

To define a region go to the Home tab > Draw > Region. Then select the required objects, each of which must be a closed area like a circle or polyline. Then hit Enter.

Alternatively, you can use Boolean operations like Union, Subtract or Intersect. Go to Home > Solid Editing > Union (or Subtract or Intersect) > and select the 2 areas to unite > finishing by hitting Enter.

To calculate the mass properties of 2d regions (or 3d solids) go to Tools tab > Inquiry > Mass properties (or type in massprop into the Command line).

You can also create a region or a polyline from an enclosed area (like site boundaries) by using the Boundary command: Home > Draw > Boundary > and click on the various points that make up the boundary.
More information on all features of Autocad can be found at the AutoDesk website. And see many examples of our clients’ work on our Facebook page.
Other related Autocad 2d Blog Posts:

• Autocad 2d basics
• Autocad 2d introduction
• Autocad 2d drawing
• Autocad 2d workspace
• Autocad 2d isometric