A stretch is the Cloze (1): JXUwMDNkJXUwMDBiJXUwMDAyJXUwMDBkJXUwMDEzJXUwMDE1JXUwMDAyJXUwMDA4JXUwMDA4JXUw MDBiJXUwMDFh of a plane shape in one direction (one way) or two directions(two-way).One line is Cloze (2): JXUwMDMxJXUwMDA3JXUwMDE4JXUwMDE3JXUwMDEzJXUwMDFiJXUwMDA4JXUwMDBmJXUwMDFh and all other points move in a direction perpendicular to it. The ratio is the stretch factor. A stretch is described fully by stating the Cloze (3): JXUwMDMxJXUwMDA3JXUwMDE4JXUwMDE3JXUwMDEzJXUwMDFiJXUwMDA4JXUwMDBmJXUwMDFh line and the stretch Cloze (4): JXUwMDNlJXUwMDA3JXUwMDAyJXUwMDE3JXUwMDFiJXUwMDFk .