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The Reference Geometry feature plays a crucial role in 3D modeling by allowing the creation of auxiliary entities such as planes, axes, and points. These entities serve as essential tools for defining relationships between model components, establishing constraints, and facilitating more complex designs. For instance, reference planes can be used for sketching in various orientations or can act as construction guides for features, while reference axes and points are instrumental in aligning and positioning parts accurately.

This feature significantly enhances the modeling process by providing a structured approach to organizing geometrical features and creating reference points that are not part of the final part but serve important functions during the design phase. By creating these auxiliary entities, designers can achieve greater precision and flexibility when manipulating and assembling model components.