Angle Relationships
Vertical angles >opposite each other at the intersection and are equal
Adjacent angles > next to each other at the intersection
 1 and 2
 2 and 3
 3 and 4
 4 and 1
Complimentary angles > 2 angles that sum to 90
Supplementary angles > 2 angles that sum to 180
Corresponding angles > when the transversal cuts other lines

 Angels at the same location at each intersection are equal
 1 and 5
 2 and 6
 4 and 8
 3 and 7
 72 and 2 are vertical angles (equal)
 72and 1 are supplementary
 180– = angle 1
 1 and 3 are vertical angles (equal)
 Use corresponding angles to find 4,5,6,7