I will give medal!
Adam's proof: angle 1 + angle 2 + angle 3 + angle 4 = 360°
Therefore, angle 2 + angle 3 = 180° (t is a straight line)
Hence, angle 1 = angle 3 (Transitive Property of Equality)
Darius' proof: angle 1 + angle 4 = 180° (t is a straight line)
angle 1 + angle 2 = 180° (PQ is a straight line)
Therefore, angle 1 + angle 2 = angle 1 + angle 4 (Transitive Property of Equality)
Hence, angle 2 = angle 4 (Subtraction Property of Equality)
Which statement is correct?
Only Adam's proof is correct.
Both Adam's and Darius' proofs are correct.
Both Adam's and Darius' proofs a

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i guess both Adam's and Darius's proofs are correct.

can you explain why? @insa

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