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

What are corresponding angles?

Back

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

Front

What is the relationship between alternate interior angles?

Back

Alternate interior angles are equal when two parallel lines are cut by a transversal.

Front

What is a linear pair of angles?

Back

Two adjacent angles that form a straight line and sum up to 180 degrees.

Front

What are alternate exterior angles?

Back

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

Front

How do you identify corresponding angles?

Back

By their position relative to the transversal and the parallel lines.

Front

What is the sum of the angles in a linear pair?

Back

180 degrees.

Front

What is the relationship between same-side interior angles?

Back

Same-side interior angles are supplementary when two parallel lines are cut by a transversal.

Front

What is the definition of vertical angles?

Back

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