Diana and Joby wrote the following proofs to prove that vertical angles are congruent. Who is correct?

Question

anonymous · Answer

Diana's Proof

Statement	Justification
∠1 + ∠2 = 180°	Definition of Supplementary Angles
∠1 + ∠4 = 180°	Definition of Supplementary Angles
∠1 + ∠2 = ∠1 + ∠4	Transitive Property of Equality


Joby's Proof

Statement	Justification
∠2 = ∠4	Vertical angles are congruent.
∠1 = ∠3	Vertical angles are congruent.
Vertical angles are congruent.	Vertical Angle Theorem

anonymous · Answer

attachment

anonymous · Answer

Diana is correct, but Joby is not.

 Both Diana and Joby are correct.

 Neither Diana nor Joby is correct.

 Joby is correct, but Diana is not.