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 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 consecutive interior angles?

Back

Angles that are on the same side of the transversal and between the two lines.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect; they are always congruent.

Front

What is the relationship between alternate interior angles?

Back

They are congruent when the lines are parallel.

Front

What is the sum of complementary angles?

Back

90 degrees.

Front

What is the sum of supplementary angles?

Back

180 degrees.

Front

If two lines are cut by a transversal and the corresponding angles are equal, what can be said about the lines?

Back

The lines are parallel.