You may be able to determine the height \(h\) of a cone (the altitude from the apex, perpendicular to the base), or the slant height \(l\) (which is the length from the apex to the edge of the circula...You may be able to determine the height \(h\) of a cone (the altitude from the apex, perpendicular to the base), or the slant height \(l\) (which is the length from the apex to the edge of the circular base). Just as the volume of a pyramid is \(\dfrac{1}{3}\) the volume of a prism with the same base and height, the volume of a cone is \(\dfrac{1}{3}\) the volume of a cylinder with the same base and height.