sum of angle in a straight line = 180^\circ 35 + m = 180 m = 180 - 35 = 145^\circ Corresponding angles are congruent i.e equal to each other Angle X and M are congruent = 145 sum of angle in a straight line = 180^\circ 110 + n = 180 m = 180 - 110 = 70^\circ Angle Y and N are congruent = 70^\circ \(\therefore\) ( x + y) = ( 145 + 70)^\circ (x + y) = 215^\circ