Joel and Melinda provide the following proofs for vertical angles to be equal:
(image)

Joel's proof: angle 2 + angle 3=180° (t is a straight line)
angle 1 + angle 2 = 180° (PQ is a straight line)
Therefore, angle 1 + angle 2 = angle 2 + angle 3 (Transitive Property of Equality)
Hence, angle 1 = angle 3 (Subtraction Property of Equality)

Melinda's proof: angle 1 + angle 2 + angle 3 + angle 4 = 360°
Therefore, angle 1 + angle 4 = 180° (t is a straight line)
Hence, angle 4 = angle 2 (Transitive Property of Equality)

Which statement is correct?

Question

Joel and Melinda provide the following proofs for vertical angles to be equal:
(image)

Joel's proof: angle 2 + angle 3=180° (t is a straight line)
 angle 1 + angle 2 = 180° (PQ is a straight line) 
 Therefore, angle 1 + angle 2 = angle 2 + angle 3 (Transitive Property of Equality)
 Hence, angle 1 = angle 3 (Subtraction Property of Equality)

Melinda's proof:  angle 1 + angle 2 + angle 3 + angle 4 = 360°
 Therefore, angle 1 + angle 4 = 180° (t is a straight line)
 Hence, angle 4 = angle 2 (Transitive Property of Equality)

Which statement is correct?

anonymous · Answer

Only Joel's proof is correct. 

 Only Melinda's proof is correct. 

 Both Joel's and Melinda's proofs are correct. 

 Both Joel's and Melinda's proofs are incorrect.

anonymous · Answer

@ganeshie8 @myininaya

princeharryyy · Answer

Both Joel's and Melinda's proofs are correct. @izthewiz7

anonymous · Answer

are you sure? because I thought that too till that last part of Joels proof throwed me off..

princeharryyy · Answer

ofcousr I am

anonymous · Answer

the correct answer is A
Only Joel's proof is correct.
i just took the test