The area of a circle is #64pi cm^2#, how do you find its radius?

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Answer 1 · 2016-10-25T13:55:24

#r = 8 cm#

We know the formula for calculating the area of a circle is #A = pi * r^ 2# where #r# is the radius.

Substituting what we know:

# 64 pi cm^2 = pi r^2# we solve for #r#

#64 pi (cm^2) / pi = pi r^2 / pi#

#64 cm^2 = r^2#

#sqrt(64 cm^2) = sqrt(r^2)#

#r = 8 cm#