2. each of the circles below has an rea of 196pi square units. find the perimeter of the rectangle.

 so hmmm if  you look at the picture below

the lenght of the rectangle, is really just 4 radius worth, or 2 diameters for that matter, and the width of the rectangle is 1 diameter worth, or 2 radius, so the perimeter of the rectangle containing the circles is really just 2r + 2r + 4r + 4r, or just 12r.

we know the area of each circle is 196π, thus