Parallel and Perpendicular Lines - Math BH

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet. They have the same slope.

Front

What are perpendicular lines?

Back

Perpendicular lines are lines that intersect at a right angle (90 degrees).

Front

What is the slope of parallel lines?

Back

The slopes of parallel lines are identical.

Front

What is the slope of perpendicular lines?

Back

The slopes of perpendicular lines are opposite reciprocals.

Front

If two lines have the same slope, what can we say about them?

Back

They are parallel.

Front

If the slopes of two lines are -2 and 1/2, what can we say about them?

Back

They are perpendicular.

Front

What transformation do parallel lines represent?

Back

Translation.

Front

What transformation do perpendicular lines represent?

Back

Rotation about their point of intersection.

Front

True or False: A pair of parallel lines can intersect at some point.

Back

False.

Front

True or False: The slopes of two lines that are parallel are different.

Back

False.