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 crosses at least two other lines.

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 same-side interior angles?

Back

Angles that are on the same side of the transversal and inside the two lines.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines cross.

Front

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

Back

They are equal.

Front

If angle 4 is 45 degrees, what is the measure of angle 8?

Back

45 degrees (corresponding angle to angle 4).

Front

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

Back

They are equal.

Front

What is the sum of the measures of same-side interior angles?

Back

They add up to 180 degrees.