Question

Earl and Sean provide the following proofs for vertical angles to be equal.

Answer 1

Earl's proof: angle 1 + angle 2 = 180° (PQ is a straight line)
angle 3 + angle 4 = 180°(PQ is a straight line)
Therefore, angle 1 + angle 2 = angle 3 + angle 4
Hence, vertical angles are equal.

Sean's proof: angle 1 + angle 4 = 180° (transversal t is a straight line)
angle 2 + angle 3 = 180°(transversal t is a straight line)
Therefore, angle 1 + angle 4 = angle 2 + angle 3
Hence, vertical angles are equal.

Answer 2

Which statement is correct?

Answer 3

Select one:
a. Only Earl's proof is correct.
b. Both Earl's and Sean's proofs are correct.
c. Only Sean's proof is correct.
d. Both Earl's and Sean's proofs are incorrect.

Answer 4

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