the formula for the Circumference of a circle is pi x diameter
the diameter = twice the radius
so, C = pi x d or pi x 2r
C = 3.1415 x 30 cm x 2 = 188.5cm
Dani A.
asked • 05/11/16what is the circumference of a wheel 30 cm in radius?
Round answer to the nearest tenth of a centimetre
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