Below is a two-column proof incorrectly proving that the three angles of APQR add up to 180°: Statements Reasons Draw line ZY parallel to PQ Construction MLZRP + MZPRQ + MZQRY = mZZRY Angle Addition Postulate %3D LZRP E ZRPQ Alternate Interior Angles Theorem ZQRY E ZPQR Alternate Interior Angles Theorem MZRPQ + MZPRQ + MZPQR = MLZRY Substitution MZZRY = 180° Definition of a Straight Angle MZRPQ + mzPRQ + MZPQR = 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. O Angles QRY and PQR should be proven congruent before the construction of line ZY. O The three angles of APQR equal 180° according to Substitution. O Line ZY should be drawn parallel to segment QR.

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