Rectangle
in geometry, a parallelogram or quadrilateral figure whose angles are all right angles. An equilateral rectangle is a square. A eral rectangle is a square. A rectangle is said to be contained by any two of the angles; thus, if A B and B C represent two adjacent sides, the rectangle is said to be contained by A B and B C, or, as it is sometimes expressed times expressed, it is the rectangle under A B and B C. 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. or common alcohol by a process of distil-