# Straight Line

This cheat sheet covers the high school math concept – Straight Line. This concept is one of the important ones under Coordinate Geometry. It forms the foundation of the following chapters – Circle, Parabola, Ellipse and Hyperbola.

A good knowledge of the basics of coordinate geometry is a must to understand and solve problems related to straight line. A cheat sheet on Coordinate Geometry Basics is also available on this website.

The formulas / concepts covered in straight line are a must to understand and solve problems related to Circle, Parabola, Ellipse and Hyperbola. Cheat sheets on each of these chapters are also available on this website: Circle, Parabola, Ellipse, Hyperbola.

This one page PDF covers summarised theory and the most important formulas related to the concept. Keep it handy while you’re revising the concept, especially before an exam.

The topics included in this cheat sheet are:

• Equations of a Straight Line
• Parallel to Axes
• Slope-Intercept Form
• Intercept Form
• Point-Slope Form
• Two-Point Form
• Parametric Form
• General Form
• Equations representing the same line
• Angle between Lines
• Point of Intersection
• Concurrency of Lines
• Distance of a Point from a Line
• Distance between Parallel Lines
• Position of point w.r.t. a Line
• Angle Bisectors
• Family of Lines
• Pair of Straight Lines through Origin