Face (geometry)
In geometry, a face of a polyhedron is any of the polygons that make up its boundaries. For example, any of the squares that bound a cube is a face of the cube. The suffix -hedron is derived from the Greek word ἕδρα (hedra) which means "face".
Sometimes, in the case of a pyramid, the term face is understood to exclude the base.
The (two-dimensional) polygons that bound higher-dimensional polytopes are also commonly called faces. Formally, however, a face is any of the lower dimensional boundaries of the polytope, more specifically called an n-face.
Read more about Face (geometry): Formal Definition, Facets
Famous quotes containing the word face:
“My face is muffled in my mother’s clothing. Her rhinestones injure me. See: my feet are going. Fish flee the forefinger of my aunt. The sun streams over the geraniums. What has this to do with what I feel, with what I am.”
—William Gass (b. 1924)