WAEC 2021 · Paper 1 · Q33

The transversal marked $110^\circ$ makes $110^\circ$ with the rightward direction at both parallel lines (corresponding angles).

So $y = 180^\circ - 110^\circ = 70^\circ$ (angles on a straight line).

The other transversal makes $35^\circ$ with the rightward direction at both lines, so at the lower line $x = 180^\circ - 35^\circ = 145^\circ$.

So $x + y = 145^\circ + 70^\circ = 215^\circ$, option A.