Find the area of a circle with a circumference of 12π either enter an exact answer in terms of or use 3.14 and enter your answer as a decimal.

The area of a rectangle is 10 cm^2. one side of the rectangle is x cm. express the perimeter of the rectangle in terms of x and show that this rectangle cannot have a perimeter of 12 cm. the perimeter of the rectangle in terms of x is __ cm