Cross slope describes the slope of a roadway perpendicular to the centerline. The midpoints of the sides of any quadrilateral with perpendicular diagonals form a rectangle. Two orthogonal lines that intersect are said "perpendicular". It is measured relative to the plane perpendicular to the work surface. This effect is best seen in gemstones cut in cabochon form perpendicular to the c-axis. Lift is the component of this force that is perpendicular to the oncoming flow direction. Iodine is an insulator in the direction perpendicular to its planes. Eddy currents flow in closed loops in planes perpendicular to the magnetic field. The latter is constant over each plane perpendicular to formula 4. Such a representation on perpendicular axes lends itself to straightforward implementation. Carbon is brittle, and behaves as a semiconductor in a direction perpendicular to its planes. The polarization of a photon is measured in a pair of perpendicular directions. They consist of short sleeves surrounded by a perpendicular flange. Then formula 86, the space of vectors perpendicular to every element of formula 85. The irregular satellites begin with wide range of inclinations including prograde, retrograde, and perpendicular orbits.