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English definition of “polygon”

polygon

noun [C]    /ˈpɑl·ɪˌɡɑn/
geometry a flat shape with three or more straight sides: Triangles and squares are polygons. polygonal  /pə·ˈliɡ·ə·nəl/ noun [C] geometry
(Definition of polygon noun from the Cambridge Academic Content Dictionary © Cambridge University Press)
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