Answer:
option 2: 112°
Step-by-step explanation:
IA = interior angle
IA1 + IA2 + IA3 = 180
IA1 = IA2
IA1 + IA1 +IA3 = 180
2IA1 + IA3 = 180
2(34)+ IA3 = 180
IA3 = 180 - 68
IA3 = 112°
