Parallel lines cut by a traversal line (Lesson 6)

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 and are equal.

Front

What are alternate interior angles?

Back

Angles that are on opposite sides of the transversal and inside the two lines; they are equal if the lines are parallel.

Front

What are vertical angles?

Back

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

Front

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

Back

They are equal.

Front

If angle P measures 70 degrees, what is the measure of angle Q if they are corresponding angles?

Back

70 degrees.

Front

If angle A measures 45 degrees, what is the measure of angle B if they are alternate interior angles?

Back

45 degrees.

Front

If angle X measures 110 degrees, what is the measure of angle Y if they are vertical angles?

Back

110 degrees.

Front

What is the sum of the interior angles on the same side of the transversal?

Back

They are supplementary, meaning they add up to 180 degrees.