What is the volume of the composite figure? a rectangular prism is positioned vertically; at the top it joins another rectangular prism at a ninety degree angle. this prism extends horizontally to the right. at the far right side, this rectangular prism joins another rectangular prism at a ninety degree angle. this last section extends vertically upward. the first section sits on its square base with sides measuring 4 yards. along the left side, the height of this section is labeled 8 yards. on the next, horizontal section, the bottom side is labeled twelve yards. the width of that section, w