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 crosses at least two other 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 corresponding angles?

Back

Angles that are in the same position on two different lines 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 vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

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

Back

They are equal.

Front

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

Back

They are equal.

Front

If ∠1 and ∠2 are a linear pair, what is the relationship between them?

Back

They sum up to 180 degrees.

Front

If ∠3 and ∠4 are vertical angles, what can be said about their measures?

Back

They are equal.