Answer:
(9/4)π
Explanation:
I will assume that the given circumference is 3π (I do not recognize your 'A').
The formula for the circumference of a circle of radius r is C = 2πr. This equals 3π. Thus, 2r must equal 3 and so r equals 3/2.
The exact area of this circle is A = πr² = π(3/2)² = (9/4)π