Amanda and stephen wrote the following proofs to prove that vertical angles are congruent. who is correct? line segment nt intersects line segment mr forming four angles. angles 1 and 3 are vertical angles. angles 2 and 4 are vertical angles. amanda's proof statement justification ∠1 + ∠4 = 180° definition of supplementary angles ∠3 + ∠4 = 180° definition of supplementary angles ∠1 + ∠4 = ∠3 + ∠4 transitive property of equality ∠1 ≅ ∠3 subtraction property of equality stephen's proof statement justification ∠1 + ∠2 = 180° definition of supplementary angles ∠2 + ∠3 = 180° definition of supplementary angles ∠1 + ∠2 = ∠2 + ∠3 transitive property of equality ∠1 ≅ ∠3 subtraction property of equality