Create And Combine Areas (Regions) - Autodesk 057B1-41A111-1001 - AutoCAD LT 2010 User Manual

that line, or you create a construction line at a specific angle to the
horizontal axis by specifying an angle and then a point through which
the construction line should pass.
Bisector. Creates a construction line that bisects an angle you specify.
You specify the vertex and the lines that create the angle.
Offset. Creates a construction line parallel to a baseline you specify. You
specify the offset distance, select the baseline, and then indicate on which
side of the baseline to locate the construction line.
Rays
A ray is a line in three-dimensional space that starts at a point you specify and
extends to infinity. Unlike construction lines, which extend in two directions,
rays extend in only one direction. Using rays instead of construction lines can
help reduce visual clutter. Like construction lines, rays are ignored by
commands that display the drawing extents.

Create and Combine Areas (Regions)

Regions are 2D enclosed areas that have physical properties such as centroids
or centers of mass. You can combine existing regions into a single, complex
region.
Regions can be used for
Extracting design information, such as areas and centroids, using
MASSPROP
Applying hatching and shading
Create Objects | 191