Parallel Lines Cut by 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 alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

What are corresponding angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines cross.

Front

If angle 1 is 135 degrees, what is angle 3?

Back

135 degrees (corresponding angles are equal).

Front

If angle 6 is 25 degrees, what is angle 7?

Back

155 degrees (angle 7 is the supplementary angle to angle 6).

Front

What is the relationship between alternate interior angles when lines are parallel?

Back

They are equal.

Front

What is the relationship between alternate exterior angles when lines are parallel?

Back

They are equal.