polygon

A plane figure bounded by edges that are all straight lines.
The boundary of such a figure.
(broadly) A figure comprising vertices and (not necessarily straight) edges, alternatingly.
Such a figure and its interior, taken as a whole.

polygonal shape

πολύγωνο

From Ancient Greek πολύγωνον (polúgōnon), from πολύς (polús, “many”) + γωνία (gōnía, “angle”), equivalent to poly- + -gon.

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