Answer:
x = 55 degree
Step-by-step explanation:
let the another angle be y
y+108=125 (sum of two interior opposite angle is equal to the exterioe angle formed)
y=125-108
y=17
y+x+108=180 degree (sum of interior angle of a triangle)
17 + x + 108 =180
x + 125 =180
x = 180-125
x=55
