ACT ASPIRE Math Tip

Published on Saturday, July 23rd, 2016 by

 

What is the circumference, in centimeters, of a circle whose radius is 16 centimeters?

 

 
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The equation of the circumference of a circle is given by C = 2πr. If the radius of a circle is 16 centimeters, then its circumference is C = 2π(16) = 32π centimeters or about 113.04.