line segment joining two adjacent vertices in a polygon or polytope From Wikipedia, the free encyclopedia
In geometry, a side is a straight line that is part of a shape. A shape made of straight lines is called a polygon. The number of sides on a polygon can be written as .
A side can also mean the face of a 3D shape. A 3D shape made of flat faces is called a polyhedron. The number of faces on a polyhedron can be written as .[1][2][3]
As an example, the square on the right has four sides. The sides in this picture are made with black straight lines. The four sides are:
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