Mr. David decided to try a new method to help his students visualize three-dimensional figures in class. First, he cut a rectangle out of heavy paper and taped it to the edge of an unsharpened pencil. He then locked the pencil into a drill and turned the drill on. As the drill rotated, the pencil turned and so did the rectangle, producing an image of a cylinder. Which three-dimensional figure would Mr. David be able to illustrate if he taped a right triangle to the pencil?