What is the term for a feature that specifies the geometry of parts in CAD?

The correct answer is dimensions, which play a pivotal role in conveying the size and proportions of the geometrical aspects of parts in CAD (Computer-Aided Design). Dimensions provide critical numerical values that define the exact measurements of an object—such as length, width, height, radius, angles, and other important geometric properties.

By applying dimensions in CAD environments, designers and engineers can ensure that the parts they are creating will fit together as intended and function appropriately in the physical world. These numerical specifications are essential for manufacturing processes, as they guide the fabrication of parts to precise requirements.

The other terms listed, while relevant in the context of CAD, do not serve the primary function of defining geometry in the same way. Detail View refers to a particular area of a drawing that is magnified for clarity, Chamfer is a specific type of edge treatment to create a beveled surface, and Data Panel is a user interface element that organizes and displays information. None of these options inherently specify the geometry of parts as dimensions do.