∠COB and ∠COA

∠AOD and ∠AOC

∠COB and ∠AOD

∠BOD and ∠AOD

acute

total 180 degrees

congruent (equal measures)

adjacent angles

Corresponding angles

Supplementary angles

Vertical angles

Alternate Exterior Angles

 $\angle5\ and\ \angle3$ 

 $\angle2\ and\ \angle4$ 

 $\angle1\ and\ \angle4$ 

$\angle6\ and\ \angle4$

∠1 and ∠4

∠6 and ∠5

∠2 and ∠4

∠1 and ∠6

20^o

70^o

160^o

180^o

Alternate Interior Angles

Supplementary Angles

Vertical Angles

Corresponding Angles

60°

70°

50°

140

x = 118

x = 108

x = 28

x = 58

Complementary

Supplementary

Neither

∠4

∠1

∠2

∠5

Adjacent Angles

Linear Pair

Complementary Angles

Supplementary Angles

Vertical Angles