Parallel Lines & 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

Define vertical angles.

Back

Angles that are opposite each other when two lines intersect; they are equal in measure.

Front

What are corresponding angles?

Back

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

Front

What are alternate interior angles?

Back

Angles that lie between two parallel lines on opposite sides of a transversal; they are equal.

Front

What are alternate exterior angles?

Back

Angles that lie outside two parallel lines on opposite sides of a transversal; they are equal.

Front

Define linear pair of angles.

Back

A pair of adjacent angles formed when two lines intersect; they are supplementary (add up to 180 degrees).

Front

What are consecutive interior angles?

Back

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

Front

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

Back

They are equal in measure.

Front

What is the relationship between alternate exterior angles when two parallel lines are cut by a transversal?

Back

They are equal in measure.