Below is a two-column proof incorrectly proving that the three angles of PQR add up to 180: Statements Reasons Draw line ZY parallel to segment PQ Construction mZRP + mPRQ + mQRY = mZRY Angle Addition Postulate ZRP RPQ Alternate Interior Angles Theorem QRY PQR Alternate Interior Angles Theorem mRPQ + mPRQ + mPQR = mZRY Substitution mZRY = 180 Definition of a Straight Angle mRPQ + mPRQ + mPQR = 180 Additive Property of Equality Which statement will accurately correct the two-column proof? The measure of angle ZRY equals 180 by definition of supplementary angles. Angles QRY and PQR should be proven congruent before the construction of line ZY. The three angles of PQR equal 180 according to Substitution. Line ZY should be drawn parallel to segment QR.\