Lines

• Agonic Lines
• Cayley Lines
• Centroidal Line
• Circle-Line Intersection
• Coincident Lines
• Collinear
• Collinear Points
• Connex
• Cross
• de Bruijn-Erdős Theorem
• Dedekind's Axiom
• Double Six
• Double Sixes
• Ellipse-Line Intersection
• Endpoint
• Face Diagonal
• Half-Line
• Imaginary Line
• Intercept Form
• Intersecting Lines
• Isoclinal Line
• Isotropic Line
• Kobon Triangle
• Line
• Line at Infinity
• Line Bisector
• Line-Circle Intersection
• Line-Ellipse Intersection
• Line-Line Angle
• Line-Line Distance
• Line-Line Intersection
• Line Picking
• Line-Plane Intersection
• Line Segment
• Line Segment Picking
• Mean Line Segment Length
• Midpoint
• No-Three-in-a-Line-Problem
• Normal Line
• Orthocentric Line
• Orthogonal Lines
• Orthopolar Line
• Parabola Pedal Curve
• Pascal Lines
• Plücker Lines
• Point-Line Distance--2-Dimensional
• Point-Line Distance--3-Dimensional
• Point-Slope Form
• Proclus' Axiom
• Radial Line
• Ray
• Real Line
• Regulus
• Right Line
• Schläfli Double Six
• Secant Line
• Sheaf of Lines
• Sheaf of Planes
• Skew Lines
• Slope
• Slope-Intercept Form
• Solomon's Seal Lines
• Space Diagonal
• Sphere Line Picking
• Standard Form
• Straight Line
• Sylvester Graph
• Symmetric Points
• Tetragram
• Transversal Line
• Triangle Picking
• Trilinear Line
• Two-Point Form