Question

Adam's proof: angle 1 + angle 2 + angle 3 + angle 4 = 360°
Therefore, angle 2 + angle 3 = 180°
Hence, angle 1 = angle 3

Darius' proof: angle 1 + angle 4 = 180° (t is a straight line)
angle 1 + angle 2 = 180° (PQ is a straight line segment)
Therefore, angle 1 + angle 2 = angle 1 + angle 4
Hence, angle 2 = angle 4

Which statement is correct?

A.Only Adam's proof is correct.

B. Both Adam's and Darius' proofs are correct.

C. Both Adam's and Darius' proofs are incorrect.

D. Only Darius' proof is correct

Answer 1

I think it is D not sure