Question

In triangle abc if angle a+angle b=125 degrees and angle a+angle c=113 degrees find a

Answer 1

a+b=125
a+c=113
a+b+c=180
a+b=180-c
180-c= 125
c=55
a+55=113
a=58

Answer 2

a+b=125

a+c=113

a+b+c=180

a+b=180-c  

180-c= 125

c=55

a+55=113

a=58