RIGHT ANGLED WEDGE
Definition
An object is a <RIGHT ANGLED WEDGE> if and only if: it is a <WEDGE>; it is the result of intersecting a block and a half-space defined by a plane perpendicular to one pair of faces. Orthogonal directions x, y and z can be chosen for a <RIGHT ANGLED WEDGE> such that it is only the x dimension of the right-angular wedge that varies