Math CentralQuandaries & Queries


Question from SteVonee, a student:

Estimate the radius of a circle with the given circumference that is 192ft

Hi SteVonee,

The circumference of a circle is given by

circumference = 2 π r

where r is the radius and π is approximately 3.1416. Thus you have

192 = 2 × 3.1416 × r = 6.2832 × r

What is r?



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