Angle Vocabulary

Front

Two angles that are opposite of each other and share a vertex.

Back

Vertical angles

Front

Two angles that share a vertex and a side and do not overlap.

Back

Adjacent angles

Front

Angles whose sum is 180 degrees

Back

supplementary angles

Front

Angles whose sum is 90 degrees

Back

complementary angles

Front

What is an example of a pair of complementary angles? Options: 13° and 45°, 10° and 170°, 81° and 9°, 90° and 3°

Back

81° and 9°

Front

What kind of angles are shown?

Back

supplementary

Front

complementary, supplementary, or neither?

Back

Supplementary

Front

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

Back

∠COB & ∠AOD

Front

Vertical angles are always

Back

congruent (equal measures)