The pitcher threw three circle changeups in a row.

The circular segments of the pie were evenly distributed.

The circle is divided into several circle segments.

The pizza was cut into several circular sectors.

The pizza was cut into eight circle sectors.

Many animals, including humans, have closed circulatory systems.

I received several circular letters in the mail today.

The open circuit voltages of the batteries were measured.

Many invertebrates have open circulatory systems.

Circular economies are gaining popularity as a sustainable solution.