A face of a three-dimensional shape that is not a base. 4-face the 4-dimensional 4-polytope itself 3-faces 3-dimensional cells polyhedral faces 2-faces. A face is any of the individual flat surfaces of a solid object.
These faces are regular polygons.
An edge is important to know for various reasons. There are not so many people in the World who REALLY know how to solve Math problems. Vertex plural - vertices Flat surface of a three dimensional object. Definition of a Face in Math.