Parallel and Perpendicular Lines

Front

What are parallel lines?

Back

Parallel lines are lines in a plane that never meet; they are always the same distance apart.

Front

What are perpendicular lines?

Back

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

Front

What does it mean for lines to intersect?

Back

Lines intersect when they cross each other at one or more points.

Front

How can you identify parallel lines in a coordinate plane?

Back

In a coordinate plane, parallel lines have the same slope but different y-intercepts.

Front

How can you identify perpendicular lines in a coordinate plane?

Back

In a coordinate plane, the slopes of perpendicular lines are negative reciprocals of each other.

Front

What is the relationship between the slopes of parallel lines?

Back

The slopes of parallel lines are equal.

Front

What is the relationship between the slopes of perpendicular lines?

Back

The product of the slopes of two perpendicular lines is -1.

Front

Can two lines be both parallel and perpendicular?

Back

No, two lines cannot be both parallel and perpendicular; they are mutually exclusive.

Front

What is the angle formed by two perpendicular lines?

Back

The angle formed by two perpendicular lines is 90 degrees.

Front

What is a transversal line?

Back

A transversal line is a line that crosses at least two other lines in the same plane.