Polygon
/pˈɑlɪˌɡɑn/
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Definition
(noun) A plane figure bounded by edges that are all straight lines.
Sentence Examples
Each face of a polyhedron is a polygon.
A nonagon, sometimes called an enneagon, is a polygon with nine sides.
CEFR Practice Quiz
A hexagon is a ____ with six sides and six interior angles that sum to seven hundred twenty degrees.