If the area of a circle is 254.34 cm2, what is the diameter of the circle? Use 3.14 for pi
Area = pi r^2
area/pi = r^2
sqrt (area/pi) = r the diameter = 2r
Area = pi*r^2
254.34 = pi*r^2
254.34 = 3.14*r^2
81 = r^2
r = 9
So, the diameter = 2r, so the diameter = 18.
