Angle relationships

Front

Back

80°

Front

Back

100°

Front

Back

80°

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

What are vertical angles?

Back

Angles that are opposite of each other when lines intersect

Front

If angle ∠ABD is 67°. What is ∠DBC?

Back

23°

Front

Which are pairs of vertical angles? Options: ∠COB & ∠COA, ∠AOD & ∠AOC, ∠COB & ∠AOD, ∠BOD & ∠AOD

Back

∠COB & ∠AOD

Front

If ∠COB is 124°, then what is ∠BOD?

Back

56°, they are supplementary

Front

Find the value of x

Back

19