Angle Relationships

Front

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect and are the same measure.

Front

What is the definition of complementary angles?

Back

Two angles whose measures add up to 90°.

Front

What is the definition of supplementary angles?

Back

Two angles whose measures add up to 180°.

Front

If m∠1 = 30°, what is m∠3 if they are vertical angles?

Back

30°.

Front

If two angles are complementary and one angle measures 40°, what is the measure of the other angle?

Back

50°.

Front

If two angles are supplementary and one angle measures 70°, what is the measure of the other angle?

Back

110°.

Front

What is the relationship between adjacent angles?

Back

Adjacent angles share a common side and vertex.

Front

What are alternate interior angles?

Back

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

Front

What are corresponding angles?

Back

Angles that are in the same position on two parallel lines in relation to a transversal.

Front

If m∠A + m∠B = 90°, what type of angles are A and B?

Back

Complementary angles.