Polygon (Encyclopedia of Science)
A polygon is a geometric figure in two dimensions with three or more sides. The name comes from two Greek words, poly, meaning "many,"
and gon, meaning "angle." A polygon always has as many angles as it has sides. And in general, polygons are named to indicate the number of sides or angles they contain. Thus, a hexagon has six (hexa- means "six") sides and six angles.
Terminology used in describing polygons
Parts and properties of polygons.
Side: Any one of the straight lines that make up the polygon.
Vertex: A point where any two of the sides of a polygon meet to form an angle.
Angle: A figure formed by the intersection of two sides.
Diagonal: A line that joins any two nonadjacent (not next to each other) vertices.
Perimeter: The sum of the length of all sides.
Area: The space enclosed within the polygon.
Types of polygons.
(The entire section is 246 words.)
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