Question

in ∆ abc if angle a - angle b = 42 degree and angle b - angle c = 21 degree then angle b =





Please answer this question ​

Answer 1

Step-by-step explanation:

given : a-b=42° => a=42°+b

and, b-c=21° => c=b-21°

now ,

=> a+b+c=180°

=> 42°+b+b+b-21°=180°

=> b=53°

Hope this was hel!