Kelly and daniel wrote the following proofs to prove that vertical angles are congruent. who is correct? a. both kelly and daniel are correctb. neither of them are correctc. kelly is correctd. daniel is correct

Hi there!

The correct answer is option D - Daniel is correct. This is because when proving a theorem congruent, you cannot use the theorem to prove itself. In her proof, Kelly used the theorem. 

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Ais the answer for your question