Question

Among two interior opposite angles of an exterior angle of triangle one is 60°.if the measure of exterior angle is 105° then find the measure of other angle with reason.​

Answer 1

Given that two interior opposite angles of the exterior angle of a triangle is 60 degree and 80 degree. Measure of exterior angle is equal to sum of two interior opposite angle. Hence, measure of exterior angle will be 60°+80° = 140°.