Part 1. The area of a circular pool is approximately 7,850 square feet. The owner wants to replace the tiling at the edge of the pool. The edging is 6 inches wide, so he plans to use 6-inch square tiles to form a continuous inner edge. How many tiles will he need to purchase? | Part 2. Once the square tiles are in place around the pool, there will be extra space between the tiles. What shape of tile will best fill this space? How many tiles of this shape should he purchase?