Whenever a polyhedron doesn't cross itself, the ⇒ Number of Faces ⇒ plus the Number of Vertices (corner points) ⇒ minus the Number of Edges always equals 2 This can be stated. F + V − E = 2 A cube has 6 Faces, 8 Vertices, and 12 Edges, so: 6 + 8 − 12 = 2