PART B. What is the relationship of ∠2 and ∠5? corresponding angles are congruent alternate interior angles are congruent vertical angles are congruent same - side interior angles a PART A. What is the relationship of ∠1 and ∠6? alternate interior angles are congruent corresponding angles are congruent vertical angles are congruent same - side interior angles PART B. What is the relationship of ∠d and ∠f? corresponding angles are congruent vertical angles are congruent same - side interior angles alternate interior angles are congruent PART A. What is the relationship of ∠a and ∠f? alternate interior angles are congruent vertical angles are congruent corresponding angles are congruent same - side interior angles a a a |