Find the measures of the lettered angle.
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angle a+115= 180 [interior angles ]
angle a=180-115
angel a=65
angle c+120=180 [interior angles]
angle c=180-120
angle c=60
a+b+c= 180[ angles in linear pair]
65+b+60=180
125+b =180
b=180-125
b=50
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