Answer:
70
Step-by-step explanation:
180-120=60
180-(60+50)=70
m∠U = 70°
find the missing inside angle, V:
180° - 120°
60°
so now the total interior angle of triangle is 180°
m∠U + 60° + 50° = 180°
m∠U = 180° - 110°
