Polygon
In geometry a
polygon /ˈpɒlɪɡɒn/ is traditionally a plane figure that is bounded by a finite chain of straight line segments closing in a loop to form a closed chain or
circuit. These segments are called its
edges or
sides, and the points where two edges meet are the polygon's
vertices or
corners. The interior of the polygon is sometimes called its
body. An
n-gon is a polygon with
n sides. A polygon is a 2-dimensional example of the more general polytope in any number of dimensions. The word "polygon" derives from the Greek πολύς "much", "many" and γωνία "corner", "angle", or γόνυ "knee". The basic geometrical notion has been adapted in various ways to suit particular purposes. Mathematicians are often concerned only with the bounding closed polygonal chain and with
simple polygons which do not self-intersect, and they often define a polygon accordingly. A polygonal boundary may be allowed to intersect itself, creating
star polygons.