Circumference

Circumference is the linear distance around the outside of a closed curve or circular object. The circumference of a circle is of special importance to geometric and trigonometric concepts. However circumference may also describe the outside of elliptical closed curves. Circumference is a special example of perimeter.

Part of a series of articles on the
mathematical constant π
Uses
  • Area of disk
  • Circumference
  • Use in other formulae
Properties
  • Irrationality
  • Transcendence
Value
  • Less than 22/7
  • Approximations
  • Memorization
People
  • Archimedes
  • Liu Hui
  • Zu Chongzhi
  • Madhava of Sangamagrama
  • William Jones
  • John Machin
  • John Wrench
  • Ludolph van Ceulen
  • Aryabhata
History
  • Chronology
  • Book
In culture
  • Legislation
  • Holiday
Related topics
  • Squaring the circle
  • Basel problem
  • Feynman point
  • Other topics related to π

Read more about Circumference:  Circumference of A Circle, Circumference of An Ellipse, Circumference of A Graph