Question

Two exterior angles of a triangle equal 100° and 150°. Find all the interior angles.

Answer 1

let exterior angle of A is 100 then angle CAB = 80
and exterior angle of B is 150 then angle ABC is 30( linear pair )
angle CAB+ angle ABC + angle ACB =180( angle sum property of triangle)
80+30+angle ACB = 180
angle ACB = 180-110= 70°