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 intersects two or more lines at different points.

Front

What are alternate interior angles?

Back

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

Front

What are corresponding angles?

Back

Angles that are in the same position at each intersection where a transversal crosses two lines.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What is the relationship between alternate interior angles when two parallel lines are cut by a transversal?

Back

They are congruent.

Front

What is the relationship between corresponding angles when two parallel lines are cut by a transversal?

Back

They are congruent.

Front

What is the relationship between supplementary angles?

Back

They add up to 180°.

Front

If angle 3 measures 38°, what is the measure of angle 5 if lines are parallel?

Back

Angle 5 measures 38° (alternate interior angles are congruent).

Front

If angle 2 measures 142°, what is the measure of angle 4 if lines are parallel?

Back

Angle 4 measures 38° (supplementary angles add up to 180°).