Can you fully define a sketch shape using only dimensions and geometric relations in SolidWorks?

In SolidWorks, fully defining a sketch requires both dimensions and geometric relations to ensure that the sketch is stable and does not change inadvertently. Dimensions provide the quantitative measurements of length, radius, angles, and other parameters, while geometric relations establish the qualitative relationships between sketch entities, such as making lines parallel, collinear, or coincident.

When a sketch is fully defined, it means that every element is constrained in such a way that there are no degrees of freedom left that allow for further movement. Using only dimensions might give specific measurements, but without the necessary geometric relations, the sketch could still be ambiguous or move when editing, leading to potential design issues.

Combining both dimensions and geometric relations allows for a comprehensive and predictable design process. This is important in creating robust models where intended geometries maintain their relationships accurately throughout design changes.