Parallel Lines and Transversals

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

What are alternate interior angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What is the relationship between corresponding angles when lines are parallel?

Back

They are congruent (equal in measure).

Front

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

Back

They are congruent (equal in measure).

Front

What is the relationship between supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

If angle 1 = 27°, what is the measure of angle 4 if they are corresponding angles?

Back

Angle 4 = 27°.

Front

If angle 1 = 115°, what is the measure of angle 7 if they are congruent?

Back

Angle 7 = 115°.