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 and are congruent.

Front

What are alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

What are consecutive interior angles?

Back

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

Front

If two angles are supplementary, what is their sum?

Back

180 degrees.

Front

If two angles are congruent, what does that mean?

Back

They have the same measure.

Front

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

Back

They are congruent.

Front

If angle 5 is 70 degrees, what is the measure of angle 6 if they are corresponding angles?

Back

Angle 6 is also 70 degrees.