Parallel Lines and Transversal Problems

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 in the same plane.

Front

What are corresponding angles?

Back

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

Front

If angle 1 is 45° and angle 2 is a corresponding angle, what is the measure of angle 2?

Back

45°

Front

What are alternate interior angles?

Back

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

Front

If angle 3 is 75° and angle 6 is an alternate exterior angle, what is the measure of angle 6?

Back

75°

Front

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

Back

They are congruent.

Front

What does it mean if two angles are supplementary?

Back

Their measures add up to 180°.

Front

If two angles are supplementary and one angle measures 60°, what is the measure of the other angle?

Back

120°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.