Mathematics-Face

Flat surface of a 3 - dimensional figure is called face of a diagram.

Lateral face or Lateral Surface is surface on the sides of a solid.

In another way 2 dimensional polygon that bound higher dimensional polytopes.

Face is any of the lower boundaries of the polytope.

Eg ) Any of the squares that bound the cube is face of the cube.

0 face = 0 dimensional vertex

1 face = 1 dimensional edge

2 face = 2 dimensional polygon face

3 face = any 3 dimensional cell