To answer this question more details need to be provided. For example one a 3D shape one side is called a face.
a line
Each side is called a face.
The faces in a 3-D shape (polyhedron, for example) are bordered by edges.
A sphere
If these forms are all solid, a sphere has one side and face, a cone two, and a cylinder three. If there are hollow, they have one more face than side.
The side of your face is called the profile
An edge.
a line
An edge.
It is called a face.
It is called the face
Face
An edge.
It is called the profile
Slip face.
The cheek The Temple or as a side view, the profile.
The steep side of a dune is called the slip face. It is the side of the dune where sand grains are deposited as they slide down due to gravity.