Creating Regions by using Boundary Command

Regions are two-dimensional enclosed areas that have physical properties such as centroids or centers of mass. Two or more existing regions can be combine into a single, complex region to calculate an area.

A region can be created from an bojects that form closed loops. Loops can be a combinations of lines, polylines, circles, arcs, ellipses, elliptical arcs, aand splices. Regions can be used for, applying hatch and shading. Regions can also be used in analyzing properties, such as area by using command Massprop and List. Regions can as well be used in extracting design information, such as centroid.

Boundary dialogue box

Boundary dialogue box

There are lot of ways in AutoCAD to create regions,but the easiest way I know of creating regions are by using Boundary command. This command can be found under the Draw pulldown menu. Or at the command prmopt, type Boundary or BO for shortcut. After keying-in Boundary command, a dialogue box will appear, just click the Region or Polyline on Object type, then click Pick points, and the n select the internal point you want to be created as region.

Selected Boundary

Selected Boundary

Calculating Area of an object in AutoCAD

There are several ways to calculate or obtain the area and perimeter of an object in AutoCAD. And one of these ways is by using the AREA command. You can find it under the Tools pulldown menu, then Inquiry. Or at the command prompt, type Area.

tool_inquiry_area