Question

An
exterior angle of a triangle is of measure 120 degree and one of its interior opposite angle of measure 45 degree find the measure of the Other interior opposite angles

Answer 1

sum of two interior angles= exterior angle
suppose
45-x= 120
x=120-45
x=75

Answer 2

Exterior angles = sum of interior opposite angles

exterior angle = 120 (Given)

one of the interior angle = 45 (given)

Therefore,

the other exterior angle = 120 - 45 = 75°

Answer: The other exterior angle is 75°