## Elementary Geometry for College Students (6th Edition)

PROOF Statements | Reasons 1.) Figure as shown | 1.) Given 2.) $\angle4$ is supplementary to $\angle2$ | 2.) If the exterior sides of two adjacent $\angle$s form a line, then the $\angle$s are supplementary.
PROOF Statements | Reasons 1.) Figure as shown | 1.) Given 2.) $\angle4$ is supplementary to $\angle2$ | 2.) If the exterior sides of two adjacent $\angle$s form a line, then the $\angle$s are supplementary.