In the figure above, which of the following must be true? ∠4 ≅ ∠1 ,alternate interior angles are congruent. ∠4 ≅ ∠2 ,alternate interior angles are congruent. ∠1 + ∠2 + ∠3 = 180, three angles make up a line add up to 180. ∠1 ≅ ∠3 , corresponding angles are congruent. ∠1 ≅ ∠5 , corresponding angles are congruent. SELECT THREE THAT APPLY. In the figure above, which of the following must be true? ∠3 ≅ ∠6 , corresponding angles are congruent. ∠2 ≅ ∠1 ,alternate interior angles are congruent. ∠2 ≅ ∠5 ,alternate interior angles are congruent. ∠3 + ∠5 + ∠6 = 180, three angles make up a line add up to 180. ∠1 ≅ ∠6 , corresponding angles are congruent. SELECT THREE THAT APPLY. a a a |