Parallel Lines Angle Relationships

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are congruent angles?

Back

Angles that have the same measure.

Front

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

Back

They are supplementary.

Front

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

Back

They are congruent.

Front

What are vertical angles?

Back

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

Front

If two angles are supplementary and one angle measures 120 degrees, what is the measure of the other angle?

Back

60 degrees.

Front

If two angles are congruent and one angle measures 74 degrees, what is the measure of the other angle?

Back

74 degrees.

Front

What is the measure of angle x if it is supplementary to a 106-degree angle?

Back

74 degrees.

Front

What is the measure of angle x if it is congruent to a 120-degree angle?

Back

120 degrees.

Front

What is the sum of the measures of two supplementary angles?

Back

180 degrees.