There are many doujin circles at the anime convention.

There are no squared circles in geometry.

Math circles are a great way for students to explore advanced mathematical concepts.

She can run circles around her competitors in the race.

I often go round in circles when trying to make a decision.

The nine-point circles of the triangle intersect at the orthocenter.

The nine points circles intersect at various points.

She can run circles round her opponents on the track.

She tends to run round in circles when she's stressed.

She tends to go around in circles when trying to make a decision.