Question

An exterior angle of a triangle is 108°and it's two interior opposite angles are equal find them

Answer 1

Let two interior opposite be=2x
Interior=Exterior
2x=108°
x=108°/2
x=54°


Each angle is 54°

Answer 2

Let two interior opposite angle be x.Then,
x+x=108{Exterior angle property}
2x=108
x=108/2=54.