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Which of the following must be TRUE? ∠1 ≅ ∠6, alternate interior angles are congruent ∠3 ≅ ∠7, alternate interior angles are congruent ∠1 + ∠2 = 180, linear pair ∠3 + ∠4 = 180, linear pair ∠2 ≅ ∠5, alternate interior angles are congruent ∠5 + ∠6 +∠7 , three angles make up a line add up to 180. ∠4 ≅ ∠6, alternate interior angles are congruent SELECT FIVE THAT APPLY Which of the following must be TRUE? ∠1 ≅ ∠6, alternate interior angles are congruent ∠3 ≅ ∠7, alternate interior angles are congruent ∠4 ≅ ∠6, alternate interior angles are congruent ∠5 + ∠6 +∠7 , three angles make up a line add up to 180. ∠1 + ∠2 = 180, linear pair ∠3 + ∠4 = 180, linear pair ∠2 ≅ ∠5, alternate interior angles are congruent SELECT FIVE THAT APPLY a a a |