Parallel & Perpendicular Lines #2

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope but different y-intercepts.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees). The slopes of two perpendicular lines are negative reciprocals of each other.

Front

How do you determine if two lines are parallel from their equations?

Back

Front

How do you determine if two lines are perpendicular from their equations?

Back

Front

What is the slope-intercept form of a line?

Back

Front

How do you find the equation of a line parallel to a given line?

Back

To find the equation of a line parallel to a given line, use the same slope as the given line and substitute the coordinates of the point through which the new line passes into the slope-intercept form.

Front

How do you find the equation of a line perpendicular to a given line?

Back

To find the equation of a line perpendicular to a given line, use the negative reciprocal of the slope of the given line and substitute the coordinates of the point through which the new line passes into the slope-intercept form.

Front

Back

Front

Back

Front

If a line has a slope of 2, what is the slope of a line perpendicular to it?

Back