Working with Geometric Constraints

Geometric constraints allow you to force specific 2D objects to be coincident, collinear, concentric, parallel, perpendicular, horizontal, vertical, tangent, smooth, and symmetric; to have equal lengths; or to be fixed in world space. In the following steps, you will assign sufficient geometric constraints to ensure that a rectangle will always remain square even when it is stretched:

AutoCAD LT cannot create constraints. However, LT users can view and edit constraints that were created in AutoCAD 2012. The sample files in this chapter use generic units so they can be used by both Imperial and metric users.

  1. Go to the book's web page at, browse to Chapter 12, get the ...

Get AutoCAD® 2012 and AutoCAD LT® 2012 Essentials: Autodesk® Official Training Guide now with O’Reilly online learning.

O’Reilly members experience live online training, plus books, videos, and digital content from 200+ publishers.