(n.) A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.
QUADRILATERAL
Meaning of QUADRILATERAL in English
Webster's English dictionary. Английский словарь Webster. 2012
(n.) A plane figure having four sides, and consequently four angles; a quadrangular figure; any figure formed by four lines.
Webster's English dictionary. Английский словарь Webster. 2012