Watch the video to learn how circles and circumference play an important role in the work Steph does as a football coach, and why circles play a useful part in sport generally. Bobby: So ...

Pi, a mathematical constant denoted by the Greek letter π, is the ratio of a circle's circumference C to its diameter d: π = C/d. The circumference of a circle is, in turn, equal to 2πr ...

dazzled by the afternoon sunlight reflecting off the water and I expanded my circumference when I discovered what was in my circle. On the crest of each wave The day dances with white tap shoes.