18) The volume of is one-third of the volume of a rectangular prism with the same base and height. 19) In finding the volume of soccer a ball, the formula to use is 20) A cone exactly fills one-third of a whose base and height are equal 21) Having the same radius and height, the volume of a is two-thirds o the volume of a cylinder 22) The volume of a cylinder is the product of the circular base area and the​