Circumference

In geometry, circumference is the distance around a closed curve; for example, a circle. It is a special kind of perimeter. The length of the circumference of a circle is often written as $C$ ,^[1] with:^[2]^[3]

C = π d

where d is the diameter of the circle.

Related pages

Radius
Pi

References

↑ "List of Geometry and Trigonometry Symbols". Math Vault. 2020-04-17. Retrieved 2020-09-24.
↑ Weisstein, Eric W. "Circle". mathworld.wolfram.com. Retrieved 2020-09-24.
↑ "Radius, diameter, & circumference | Circles (article)". Khan Academy. Retrieved 2020-09-24.

Other websites

Numericana - Circumference of an ellipse
Circumference of a circle With interactive applet and animation

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[1] "List of Geometry and Trigonometry Symbols". Math Vault. 2020-04-17. Retrieved 2020-09-24.

[2] Weisstein, Eric W. "Circle". mathworld.wolfram.com. Retrieved 2020-09-24.

[3] "Radius, diameter, & circumference | Circles (article)". Khan Academy. Retrieved 2020-09-24.

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