Angle Relationships

Front

What are complementary angles?

Back

Angles that add up to 90°.

Front

What are supplementary angles?

Back

Angles that add up to 180°.

Front

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

Back

m∠3 = 60°.

Front

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

Back

m∠3 = 150°.

Front

What are vertical angles?

Back

Angles that are opposite each other when two lines intersect.

Front

What are adjacent angles?

Back

Angles that share a common side and vertex.

Front

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

Back

The other angle is 50°.

Front

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

Back

The other angle is 110°.

Front

What is the sum of the angles in a triangle?

Back

180°.

Front

What is the relationship between angles on a straight line?

Back

They add up to 180°.