text: circle has an area of 144~ square inches (~ means pi). find the circumference of the circle.? since it's 144~ (144 pi) that means i have to work backwards kind of...can i get a few explanations on how and what the answer is? thanx! i will choose a best answer, so try to make it good! (best answers give you 10 whoppin' points!) a = pi x r2 = pi x 144 inch2 so r=12 inch. the circumference of the circle = 2 pi r =24 pi = about 75 inch.