Which term describes a CAD modeling method that uses parameters to define the size and geometry of features?

Which term describes a CAD modeling method that uses parameters to define the size and geometry of features?

• A. Exploded Assembly
• B. Environmental Protection Agency
• C. Parametric Modeling
• D. Rib

Answer: (C)

Parametric modeling defines geometry and size using parameters and constraints. In this approach, you assign dimensions and relationships—like lengths, diameters, and distances—so changing one parameter automatically updates the related features to maintain the design intent. This makes it easy to iterate designs, resize parts, and keep parts consistent when specifications change. Other options describe things unrelated to how geometry is defined (an assembly view, an environmental agency, or a specific structural feature), so they don’t capture the modeling method. Therefore, the term that best fits is parametric modeling.

Parametric modeling defines geometry and size using parameters and constraints. In this approach, you assign dimensions and relationships—like lengths, diameters, and distances—so changing one parameter automatically updates the related features to maintain the design intent. This makes it easy to iterate designs, resize parts, and keep parts consistent when specifications change. Other options describe things unrelated to how geometry is defined (an assembly view, an environmental agency, or a specific structural feature), so they don’t capture the modeling method. Therefore, the term that best fits is parametric modeling.