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 Related Terms
 Area of a Polygon:  A measurement of the region enclosed by the sides of a polygon. The area is always expressed in squared units.
Side of a Polygon: A straight line segment that forms part of a polygon.
Polygon: A closed figure formed by three or more line segments.
Base (of a Polygon): For two-dimensional figures, any side can be a base. Typically, however, the bottom side, on which the polygon 'sits,' is called the base.
Area of a Circle: The measurement of the region enclosed by a circle. The area of a circle is always expressed in squared units.
Perimeter: The sum of the lengths of the sides of a polygon.