Constrain A Design With Formulas And Equations; Overview Of Formulas And Equations - Autodesk 057B1-41A111-1001 - AutoCAD LT 2010 User Manual

Dynamic dimensional constraints are more limited than annotational
dimensional constraints in where the text can be located.
NOTE Triangular grips are not available for dimensional constraints that reference
other constraint variables in expressions.
For information about temporarily relaxing constraints, see Overview of
Constraints (page 248).
See also:
Overview of Constraints (page 248)

Constrain a Design with Formulas and Equations

You can control geometry using mathematical expressions that include the
names of dimensional constraints, user variables, and functions.

Overview of Formulas and Equations

NOTE This topic has been included for AutoCAD-compatibility purposes only. In
AutoCAD LT, parametric drawing technology is limited to displaying and hiding
constraints, editing constrained geometry, and changing values at the Command
prompt.
Formulas and equations can be represented either as expressions within
dimensional constraint parameters or by defining user variables. For example,
the following illustration represents a design that constrains a circle to the
center of the rectangle with an area equal to that of the rectangle.
Add Constraints to Geometry | 263