The formula for the area of a circle is [tex]A = \pi r^2[/tex]. Lets set this equal to the area given to find the radius. [tex]153.86 = \pi r^2[/tex] [tex]49 = r^2[/tex] [tex]7 = r[/tex] The diameter is twice the radius, meaning the answer is 7*2 = 14.
