Related Terms: Vertical plane, Horizontal plane, Perpendicularity, X-axis, Orthogonality, Y-axis, Vertical angles, Z-axis, Axes, Cartesian plane, Vertical, X axis, Horizontal, Vertical axis, Y-intercept, Orthogonal, X-intercept, Normal, Coordinate plane, Tilt angle, Plunge, Dip, Vertical, Perpendicular, Strike, Y axis, Transverse plane, Cartesian coordinates, Rectangular, Tangent plane, Parallelism, Level, Abscissa, Straight angle, Transverse, Planar graph, Perpendicular lines, Angularity, Horizontal, Angle, Monoclinic, Vertex, Axis of symmetry, Ordinate, Planar, Planes, Theodolite, Cartesian coordinate system, Axis , Tangent