Special Angles on Parallel Lines Cut by a Transversal

Front

What are parallel lines?

Back

Lines in a plane that never meet and are always the same distance apart.

Front

What is a transversal?

Back

A line that crosses at least two other lines.

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines cut by a transversal.

Front

What is the relationship between corresponding angles?

Back

They are equal in measure.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two parallel lines.

Front

What is the relationship between alternate interior angles?

Back

They are equal in measure.

Front

What are alternate exterior angles?

Back

Angles that are on opposite sides of the transversal and outside the two parallel lines.

Front

What is the relationship between alternate exterior angles?

Back

They are equal in measure.

Front

What are consecutive interior angles?

Back

Angles that are on the same side of the transversal and inside the two parallel lines.

Front

What is the relationship between consecutive interior angles?

Back

They are supplementary, meaning they add up to 180 degrees.