7.1-7.2 Quiz Review

Define Obtuse Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Define Acute Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Define Right Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Define Straight Angle

• Less than 90

• Exactly 90

• Greater than 90 and less than 180

• Exactly 180

Which are pairs of vertical angles?

• ∠COB & ∠COA

• ∠AOD & ∠AOC

• ∠COB & ∠AOD

• ∠BOD & ∠AOD

Which are pairs of adjacent angles?

• ∠COB & ∠DOA

• ∠AOD & ∠AOC

• ∠COB & ∠AOD

• ∠BOD & ∠AOC

Name the vertical angle to
∠h.

• ∠f

• ∠i

• ∠g

• ∠j

Find the missing angle.  Find x.

• 20^o

• 70^o

• 160^o

• 180^o

Vertical angles are always

• acute

• total 180 degrees

• congruent (equal measures)

• adjacent angles

What is the value of x?

• 37

• 72

• 108

• 18