# Simon Singh's Numbers - Five Numbers - Pi - BBC Sounds

Simon Singh's NumbersFive NumbersFive Numbers

Released On: 12 Mar 2002

Available for over a year

At its simplest, Pi is the ratio of the circumference of a circle to its diameter.

Five NumbersFive Numbers

Released On: 12 Mar 2002

Available for over a year

At its simplest, Pi is the ratio of the circumference of a circle to its diameter.