Definition:Polygon/Base

Definition
For a given polygon, any one of its sides may be temporarily distinguished from the others, and referred to as the base.

It is immaterial which is so chosen.

The usual practice is that the polygon is drawn so that the base is made horizontal, and at the bottom.

For polygons of particular types, the following specific definitions can be made:

Base of Triangle

 * Triangle.png

Base of Isosceles Triangle

 * IsoscelesTriangle.png

Base of Parallelogram

 * Parallelogram.png