Answer:
1: a= 55
b= 125
2: b = 73
c = 107
Explanation:
1: let c
c = 125 ( being alternate angle)
a+c = 180 (linear pair)
a = 180 - 125
a = 55
b=c=125 (being vertically opposite angle)
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2: let a
42+65+a = 180 (sum of angle of a triangle)
a = 73
b = 73 (being vertically opposite angle)
b+c = 180 (being linear pair)
c = 180-73
c = 107