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 intersects two or more lines at different points.

Front

What are corresponding angles?

Back

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

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 are alternate interior angles?

Back

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

Front

What are alternate exterior angles?

Back

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

Front

What does it mean for angles to be supplementary?

Back

Two angles that add up to 180 degrees.

Front

What does it mean for angles to be congruent?

Back

Two angles that have the same measure.

Front

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

Back

They are congruent.

Front

If two parallel lines are cut by a transversal, what can be said about the same-side interior angles?

Back

They are supplementary.