Adjacent, Vertical, Complementary, and Supplementary Angles

To find x, what equation would you use?

• 2x-6=7x+4

• 2x-6+7x+4=90

• 2x-6+7x+4=180

• 2x-6+7x+4=360

Find the value of x.

• 18°

• 28°

• 38°

• 118°

Name a pair of adjacent angles

Which angles are vertical angles?

Which angle is a vertical angle to with \angle7 ?

Which are pairs of adjacent angles?

• ∠COB and ∠DOA

• ∠AOD and ∠AOC

• ∠COB and ∠AOD

• ∠BOD and ∠AOC

Vertical angles are always

• acute

• total 180 degrees

• congruent (equal measures)

• adjacent angles

Supplementary angles always add up to

Complementary angles always add up to