Which term describes the added angled surface on a workpiece edge designed to enhance safety?

The term that describes the added angled surface on a workpiece edge designed to enhance safety is chamfer. Chamfers are typically applied to the edges of a workpiece to remove sharp corners, which can pose a risk of injury during handling or use. By creating a sloped edge, a chamfer minimizes the likelihood of cuts or scrapes, making the workpiece safer to handle.

Counterbores and countersinks serve different purposes, such as allowing for a screw head to sit flush with the surface of the material and facilitating the seating of fasteners, respectively. Contour refers to a shape or outline, rather than a specific modification for enhancing safety. Thus, chamfer is specifically designed with safety in mind, making it the correct choice for this question.