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 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 alternate exterior angles?

Back

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

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What is a linear pair of angles?

Back

A pair of adjacent angles that are formed when two lines intersect and are supplementary.

Front

What does it mean for angles to be complementary?

Back

Two angles that add up to 90 degrees.

Front

What does it mean for angles to be supplementary?

Back

Two angles that add up to 180 degrees.

Front

How do you identify corresponding angles?

Back

Look for angles that are in the same relative position at each intersection.