How do you find the circumference of a circle with diameter 7.2cm?

Algebra

##7.2 pi## cm

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The formula for the circumference of a circle is:

##Circumference = 2 xx pi xx Radius## or ##Circumference = pi xx Diameter##

You’re given the diameter, so we can use the second formula. ##Circumference = 7.2 pi## cm

Your class might use different approximations for ##pi##, such as ##3.14## or ##22/7##. Make sure to use them if you have to.