Answer: See explanationStep-by-step explanation:m∠A and m∠O are alternate interior angles so they're congruent.m∠A = m∠Om∠A = 65°AM and SO are congruent sidesAM = SOAM = 86m∠S and m∠M are alternate interior angles so they're congruent.m∠S = m∠Mm∠S = 60°ON and NA are congruent sides.ON = NAON = 75m∡SNO, m∠S, and m∠O form a triangle so they should add up to 180°m∡SNO + m∠S + m∠O = 180°m∡SNO + 60 + 65 = 180m∡SNO + 125 = 180Subtract both sides by 125m∡SNO = 55°Hope that helped!