A circular "Do Not Enter" road sign has a diameter of 54 centimeters. Which measurement is closest to the area of the sign in square centimeters? 84.78 cm² 169.56 cm² 339.12 cm² 2289.06 cm²

The figures below are made out of circles, semicircles, quarter circles, and a square. find the area and the perimeter of each figure and give your answers as a completely simplified exact value in terms of π (no approximations).