Angle Vocabulary

An angle measuring more than 90 degrees but less than 180 degrees

• right angle

• obtuse angle

• vertical angles

• supplementary angles

Angles whose sum is 180 degrees

• adjacent angles

• complementary angles

• vertical angles

• supplementary angles

two angles that share a vertex and a side and do not overlap

• adjacent angles

• complementary angles

• vertical angles

• supplementary angles

What is an example of a pair of complementary angles?

• 13° and 45°
• 10° and 170°
• 81° and 9°
• 90° and 3°

An angle whose measure is 90 degrees

• right angle

• obtuse angle

• vertical angles

• supplementary angles

Which are pairs of vertical angles?

• ∠COB & ∠COA

• ∠AOD & ∠AOC

• ∠COB & ∠AOD

• ∠BOD & ∠AOD

Angles whose sum is 90 degrees

• adjacent angles

• complementary angles

• vertical angles

• supplementary angles

complementary, supplementary, or neither?

• Complementary
• Supplementary
• Neither

What kind of angles are shown?

• complementary

• supplementary

• vertical

• corresponding

Vertical angles are always

• acute
• total 180 degrees
• congruent (equal measures)
• adjacent angles