Parallel Lines Cut by a 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

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

Back

Corresponding angles are congruent.

Front

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

Back

Alternate interior angles are congruent.

Front

What are alternate exterior angles?

Back

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

Front

If two angles are supplementary, what is the sum of their measures?

Back

The sum of their measures is 180 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are congruent.

Front

If angle 5 is 70 degrees, what is the measure of its corresponding angle?

Back

The corresponding angle is also 70 degrees.

Front

What is the definition of complementary angles?

Back

Two angles whose measures add up to 90 degrees.

Front

If two lines are parallel, what can be said about the same-side interior angles?

Back

Same-side interior angles are supplementary.