# Straight Line

#### Introduction

An introduction to Straight Lines in coordinate geometry.

#### Slope-Intercept Form: Part 1

Derivation of the slope-intercept form of the equation of a straight line.

#### Slope-Intercept Form: Part 2

Derivation of the slope-intercept form of the equation of a straight line.

#### Slope-Intercept Form: Examples

A few examples related to the Slope-Intercept form of the equation of the straight line.

#### Intercept Form

Derivation of the Intercept Form of the equation of a straight line.

#### Intercept Form : Examples

A few examples related to the intercept form of the equation of a straight line.

#### Point-Slope Form

Derivation of the Point-Slope form of the equation of a straight line.

#### Point-Slope Form: Examples

A few examples involving the point-slope form of the equation of a straight line.

#### Two Point Form

Derivation of the two-point form of the equation of a straight line.

#### Two Point Form: Examples

Examples involving the two-point form of the straight line.

#### Normal Form

Derivation of the Normal Form of the equation to a Straight Line.

#### Normal Form: Examples

Examples involving the Normal Form of the equation to a Straight Line.

#### General Form

General form of the equation of a Straight Line in a plane.

#### Comparison of Equations

Relation between two (or more) equations representing the same line, or a curve in general.

#### Intersection and Concurrency

Intersection of two lines, and condition for three lines to be concurrent.

#### Slope of a Line

Slope of a line whose equation is known, and of a line joining two given points.

#### Angle Between Two Lines

Angle between two lines, and condition for two lines to be parallel or perpendicular.

#### Parallel and Perpendicular Lines

The condition for two lines in the Cartesian plane to be parallel or perpendicular.

#### Angle Between Two Lines: Examples

A few examples involving the formula for angle between two lines.

#### Angle Between Two Lines: Examples

A few examples involving the formula for angle between two lines.

#### Distance of a point from a line

Derivation of the expression for the perpendicular distance of a point from a given line.

#### Distance of a point from a line: Examples

A few examples to illustrate the formula of distance of a point from a given line.

#### Distance between Parallel Lines

Derivation of the expression for calculating the distance between two parallel lines.

#### Distance between Parallel Lines: Examples

A few examples involving the formula for distance between parallel lines.

#### Parametric Form

Derivation of the parametric form of the equation of a straight line.

#### Parametric Form: Examples

A few examples involving the parametric equation of the straight line.

#### Parametric Form: Examples

Some more examples involving the parametric equation of the straight line.

#### Position of a Point

Condition for two points to lie on the same or the opposite sides of a given line.

#### Position of a Point: Examples

A few examples to involving relative positions of points with respect to a given line.

#### Family of Lines

Equation representing a Family of Lines passing through a given point.

#### Family of Lines: Examples

A few examples to illustrate the concept of family of lines.

#### Angle Bisectors

Derivation of equations to the angle bisectors of a pair of straight lines

#### Angle Bisectors: Examples

A few examples to illustrate angle bisectors of a pair of straight lines.