The Science of Living Things series demonstrates that Bobbie Kalman and her staff have turned out yet another informative and finely produced series of books. . . . this whole series would make a welcome addition to the elementary school library -- Kay Lehr, Fort Rouge School, Manitoba, Jan. 1999.
perpendicularity - the quality of being at right angles to a given line or plane (especially the plane of the horizon) oblongness, rectangularity - the property of being shaped like a rectangle.
orthogonality, In mathematics, orthogonality is the relation of two lines at right angles to one another (perpendicularity), and the generalization of this Cookies help us deliver our services. By using our services, you agree to our use of cookies.