What must be defined for a hole to remain centered if dimensions are changed?

To ensure that a hole remains centered when dimensions are changed, a relationship must be defined in the sketch. Relationships in SolidWorks establish constraints between entities, such as making a hole concentric to a circle or axis. By applying a concentric relation between the hole and the geometry around it, any change in dimensions will automatically adjust the position of the hole relative to the defined center, thus keeping it aligned as intended.

The importance of relationships is critical in parametric modeling, which SolidWorks utilizes. This allows for dynamic updates to the design without losing the integrity of the intended geometry. Defining appropriate relationships is foundational in creating robust and flexible designs that can accommodate future modifications without distorting the intended layout.