Geometry: Summary of Coordinate Geometry Formulas

Summary of Coordinate Geometry Formulas

If A ( x₁, y₁) and B( x₂, y₂,), then

distance d, from A to B =

midpoint, M, of AB =

slope, m, of

Following is a list of the equations of lines:

Standard form:	Ax + By = C
	A, B, and C are real numbers
	A and B are not both zero
Point-slope form:	y − y₁ = m ( x − x₁)
	( x₁, y₁) is a point on the line and m is the slope of the line
Slope-intercept form:	y = mx + b
	m is the slope of the line and b is the y-intercept value