A closed plane figure bounded by three or more line segments.(noun)
American Heritage(R) Dictionary of the English Language, Fifth Edition. Copyright (c) 2011 by Houghton Mifflin Harcourt Publishing Company. Published by Houghton Mifflin Harcourt Publishing Company. All rights reserved.
Use "polygon" in a sentence
"His mathematical friends could have told him, that though it was talked of as a polygon, it was not supposed to be a square; but _polygon_ would not have rhymed to _stare_; and poets, when they launch into the ocean of words, must have an eye to the helm; at all events a poet, who is not supposed to be a student of the exact sciences, may be forgiven for a mathematical blunder."
"The term polygon is applied to figures having flat sides equidistant from a common centre."
"Measuring Po by admin on Jul. 03, 2009, under Uncategorized the measure of an exterior angle of a regular polygon is 30 degrees."