rectangle

& a. [Fr.. from Lat. rectangulus =having a right angle: rectus right, and angulus =an angle; Sp. rectangulo; Ital. rettangolo.] A. As substantive: Geom.: A parallelogram or quadrilateral figure whose angles are all right angles. An equilateral rectangle is a square. A rectangle is said to be contained by any two of the sides about one of its angles; thus, if A Band BC represent two adjacent sides, the rectangle is said to be contained by A B and B c, or, as it is sometimes expre ed, it is the rectangle under ABand BC. The area of a rectangle is equal to the product of its base and altitude. Rectangles having equal bases are to each other as their altitudes; rectangles having equal altitudes, are to each other as their bases. †B. As adj.: Rectangular; having a right angle. pine, pit, sire, sir, marine; gō, pot, rectangled rect-ăn-gled (le as el), a. [Eng. rectangl (e); -ed .] 1. Ord. Lang.: Having an angle or angles of ninety degrees; rectangular. 2. Her .: When the line of length is, as it were, cut off in its straightne by another straight line, which at the intersection makes a right angle, it is then termed rectangled. rect-ăn-gu-lar, adj . [Latin rectus =right, and Eng. angular (q. v.); Fr. rectangulaire .] Having an angle or angles of ninety degrees; right-angled.