Find the area of the region that lies inside the first curve and outside the second curve. r = 9 cos θ, r = 4 + cos θ

The area is given by

You have 2 sides that are 2 cms and you have 6 sides that are 1/2 cm and you have 4 sides that are 1 cm. the smallest sides are 1/2 the medium sized sides are 1 and the smallest are 1/2. so to find the perimeter you have to add them all up together so your answer will be 11 cm's