A pair of angles on the outer side of two lines cut by a transversal, but on opposite sides of the transversal

The angles opposite of each other when two lines cross

A pair of angles on the inner side of two lines cut by a transversal, but on opposite sides of the transversal

Two angles in the same position when parallel lines are cut by a transversal

32... Same Side Interior = 180

32... Alternate Interiors = 180

32... Corresponding angles are congruent

-20... Alternate Interiors are equal

-20... Same Side Interiors are =

Add to be 180

Are congruent

Add to be 90

Are equal

 $\angle1$  and  $\angle6$  

 $\angle6$  and $\angle5$  

 $\angle7$  and $\angle8$  

 $\angle4$  and $\angle8$  

Alternate Exterior Angles

Alternate Interior Angles

Same Side Interior Angles

Corresponding Angles

 $\angle8$  

 $\angle2$  

 $\angle3$  

 $\angle4$  

 $\angle1$  

 $\angle2$  

 $\angle3$  

 $\angle4$  

 $\angle5$  

140^o

180^o

40^o

160^o