Parallel and Perpendicular lines

Front

What are perpendicular lines?

Back

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

Front

What is the slope of a line that is perpendicular to a line with a slope of -3?

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 a point through which the new line passes.

Front

What is the slope of parallel lines?

Back

Parallel lines have the same slope.

Front

Back

Front

What is the relationship between the slopes of two parallel lines?

Back

The slopes of two parallel lines are equal.

Front

Back

Front

What is the slope of a line that is perpendicular to a line with a slope of 1/2?

Back

Front

How do you determine if two lines are perpendicular?

Back

Two lines are perpendicular if the product of their slopes is -1.

Front

Back