What is a workplane in CAD?

A workplane in CAD serves as a surface where sketches can be applied, making it fundamental to the design process. This designated area allows designers to create and manipulate two-dimensional shapes, which can then be extruded or otherwise transformed into three-dimensional forms. The workplane provides a defined context for where design elements can be constructed, ensuring accuracy and precision during the drafting process.

The nature of the workplane facilitates a structured way to approach designs, as designers can easily visualize and work with how their sketches will relate to the dimensions and features of the final product. This is particularly important when considering the layout and organization of a design before ultimately transitioning to more complex modeling activities.

While other options mention aspects of CAD functions, such as measuring, storing designs, or creating 3D models, they do not specifically align with the primary role of a workplane in the context of CAD software. The focus is indeed on providing a platform for sketches, underpinning the broader design process.