# how to find circumference

\u00a9 2021 wikiHow, Inc. All rights reserved. That's the area. Math Open Reference: Circumference -- Perimeter of a Circle. The area of a circle is the space inside the circle. Circumference (C) = pi * diameter(d). In this article, we are going to discuss how to find […] wikiHow, Inc. is the copyright holder of this image under U.S. and international copyright laws. Solution: C = 2 π \pi π r C = 2 π \pi π (7) C = 43.98cm . These unique features make Virtual Nerd a viable alternative to private tutoring. They knew the circumference of a sphere formula, 2πr. References. Step by step guide to solve Circles In a circle, variable $$r$$ is usually used for the radius and $$d$$ for diameter and $$π$$ is about $$3.14$$. How do I change the mixed number into radius? Question 1. This image may not be used by other entities without the express written consent of wikiHow, Inc.