Related Terms: Transversal, Vertical line, Horizontal line, Rectilinear, Parallel lines, Axis of symmetry, Perpendicular lines, Centerline, Axis , Perpendicular, Straight line, Secant, Straightness, Alignment, Center line, Normal, Vertical angles, Chord , Midline, Axes, Diagonal, Line of best fit, Baseline, Angle, Perpendicular bisector, Corresponding angles, Vertical axis, X-axis, Tangent, Polyline, Tangent line, Orthogonality, Rhumb line, Asymptote, Linear, Plunge, Ray, Straight angle, Slant, Horizontal, Intersect, Line of symmetry, Align , Parallel, Straight, Altitude of a triangle, Strike, Base line, Lateral axis, Intercept