Question

in a triangle the exterior angle of course is 100 and opposite exterior angle of b is 70 then find a b and c

Answer 1

(interior opposite angle) a+b=100 (outer angle)
b=70
a=100-70
a=30
180=sum of interior angle
c=180-(70+30)
c=180-100
c=80
a=30 b=70 c=80