MEAM.Design - SolidWorks - Parametric Modeling / Overview
There are often times were we want to either link to dimensions together or to define explicit mathematical relationships between dimensions. Fortunately, this is possible in SolidWorks. Using parameters and equations to define your model geometry and relations can be extremely powerful, but you'll need to keep track of what you're doing to avoid causing errors.
Okay, not much to see here... moving along now...