Complementary, Supplementary, and Vertical Angles

Front

What are complementary angles?

Back

Two angles that add up to 90 degrees.

Front

What are supplementary angles?

Back

Two angles that add up to 180 degrees.

Front

What are vertical angles?

Back

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

Front

If one angle measures 30 degrees, what is its complementary angle?

Back

60 degrees.

Front

If two angles are supplementary and one measures 110 degrees, what is the measure of the other angle?

Back

70 degrees.

Front

What is the relationship between vertical angles?

Back

Vertical angles are equal in measure.

Front

If angle A is 45 degrees, what is the measure of its supplementary angle?

Back

135 degrees.

Front

What is the measure of angle B if angle A is 100 degrees and they are supplementary?

Back

80 degrees.

Front

If two angles are vertical and one measures 156 degrees, what is the measure of the other angle?

Back

156 degrees.

Front

What type of angle pair are alternate interior angles?

Back

Angles that are on opposite sides of a transversal and inside two parallel lines.