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Formed by right lines; rectilineal; as, a right-lined angle.

e, one formed by two curved lines. -- External angles, angles formed by the sides of any right-lined figure, when the sides are produced or lengthened. -- Facial angle. See under Facial. -- Internal angles, those which are within any right-lined figure. -- Mixtilineal angle, one formed by a right line with a curved…

One who directs; a director. Directer plane (Geom.), the plane to which all right-lined elements in a warped surface are parallel.

A right-lined quadrilateral figure, whose opposite sides are parallel, and consequently equal; -- sometimes restricted in popular usage to a rectangle, or quadrilateral figure which is longer than it is broad, and with right angles. Parallelogram of velocities, forces, accelerations, momenta, etc. (Mech.), a parallelog…