Find the circumference of a circle with an area of 615.75 square inches.

A=pie*radius squared is the area formula of a circle. The circumference formula or a circle is C=pie*diameter. 615.75 = (3.14) (radius) squared. Divide both sides by the 3.14. What ever 615.75 divided by 3.14 is-is radius squared. The square root is your radius. The radius is half the diameter, so double what you have right now as the radius to get the diameter. Now since C=pie*diameter, your circumference is your pie*your diameter. Whatever your answer is-is your circumference.