The angle measures of quadrilateral RSTU are shown. m∠R = (2x)° m∠S = (3x – 35)° m∠T = (x + 35)° The measure of angle U is unknown. Can quadrilateral RSTU be a parallelogram? Yes, opposite angles R and T are congruent to each other if x = 35. Yes, consecutive angles R and S are congruent to each other if x = 35. No, if x = 35, all three given angles measure 70°. The fourth angle would measure 150°. No, if x = 35, the three given angle measures make it impossible for the figure to be a quadrilateral.