Unit 3 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.

Front

What are corresponding angles?

Back

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

Front

What are same-side interior angles?

Back

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

Front

What is the relationship between same-side interior angles?

Back

They are supplementary, meaning they add up to 180 degrees.

Front

What are alternate interior angles?

Back

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

Front

What is the relationship between alternate interior angles?

Back

They are congruent, meaning they are equal in measure.

Front

What are alternate exterior angles?

Back

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

Front

What is the relationship between alternate exterior angles?

Back

They are congruent, meaning they are equal in measure.

Front

If two parallel lines are cut by a transversal, what can be said about the angles formed?

Back

Certain pairs of angles will be congruent or supplementary.