Many neighborhoods rely on babysitting circles to give parents regular breaks and build community.

The cartographers marked the azimuth circles on the map to indicate directional reference.

To locate all points P that satisfy the given distance ratio from A and B, the geometer drew the circle of Apollonius on the diagram and labeled the intersections.

In advanced geometry seminars, researchers analyze families of generalized circles to study curvature and conformal mappings.

In hyperbolic geometry, generalised circles often represent the boundaries of hyperbolic isometries.

In inversive geometry, every generalized circle can be transformed into another by an inversion centered at an appropriate point.

Advanced geometry students studied circle inversions to understand how lines and circles map under inversion.

The factory implemented several quality circles to encourage workers to suggest process improvements.

The geometry professor used Apollonian circles to demonstrate loci of points whose distances to two fixed points have a constant ratio.

We walked quietly around the ancient stone circle, feeling the weight of history under the rising sun.