1 2 x pi x 3 squared July 8, 2019 16 32 64 128 1 3 x pi x 2 squared x 7 1 3 x pi x 2 squared x 6 1 3 x pi x 2 squared x 14 1/3 x pi x 2 squared x 5 1/3 x pi x 2 squared x 11 1 3 x pi x 2 squared x 13 1 3 x pi x 2 squared x 4