## Elementary Geometry for College Students (7th Edition)

PROOF Statements | Reasons 1.) $\angle3$ is supp. to $\angle5$; $\angle4$ is supp. to $\angle6$ | 1.) Given 2.) $\angle4$ is congruent to $\angle5$ | 2.) If two lines intersect, the vertical angles formed are congruent. 3.)$\angle3$ is congruent to $\angle6$ | 3.) If two $\angle$s are supp. to congruent angles, then these angles are congruent.
PROOF Statements | Reasons 1.) $\angle3$ is supp. to $\angle5$; $\angle4$ is supp. to $\angle6$ | 1.) Given 2.) $\angle4$ is congruent to $\angle5$ | 2.) If two lines intersect, the vertical angles formed are congruent. 3.)$\angle3$ is congruent to $\angle6$ | 3.) If two $\angle$s are supp. to congruent angles, then these angles are congruent.