Select the correct answer from each drop-down menu. The roof of a children’s carousel is in the shape of a regular octagon. The beams joining the central pole of the carousel with the vertices of the octagon are each 20 feet long. The area of the canvas that covers the roof of the carousel is 1,131.4 square feet. What is the length of each side of the octagon? Diagram shows a regular octagon divided into 8 equals sized triangles. One leg of a triangle is labeled 20 feet. The apothem of the roof is feet. The perimeter of the hexagon is feet. So, each side is feet.