Challenge The radius of Circle A is 7 mm. The radius of Circle B is 2 mm greater than the radius of Circle A. The radius
of Circle C is 5 mm greater than the radius of Circle B. The radius of Circle D is 3 mm less than the radius of Circle C.
What is the area of each circle? How many times greater than the area of Circle A is the area of Circle D?
The area of Circle A is
mm²
(Simplify your answer. Type an exact answer in terms of x.)