There are no gaps between the edges or vertices in a polyhedron. Examples of polyhedrons include a cube, prism, or pyramid. Non-polyhedrons are cones, spheres, and cylinders because they have sides that are not polygons.
9/19 = x / 152....9 oz oil to 19 gallons gas = x oz oil to 152 gallons gas cross multiply because this is a proportion (19)(x) = (152)(9) 19x = 1368 x = 1368/19 x = 72 oz of oil <==
