Parallel Lines Cut By Transversal

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 at each intersection where a transversal crosses two lines.

Front

What are alternate interior angles?

Back

A pair of angles on the inner side of two lines cut by a transversal, but on opposite sides of the transversal.

Front

What are alternate exterior angles?

Back

Angles that are outside of the parallel lines and on opposite sides of the transversal.

Front

What are vertical angles?

Back

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

Front

If ∠C = 116°, what is the measure of its corresponding angle?

Back

∠C's corresponding angle is also 116°.

Front

If ∠D = 64°, what is the measure of its alternate interior angle?

Back

The alternate interior angle to ∠D is also 64°.

Front

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

Back

Alternate exterior angles are equal.

Front

How do you find the measure of an angle when given its supplementary angle?

Back

Subtract the measure of the known angle from 180°.