Question

two exterior angles of a triangle measure 153 and 105 which could not be an interior angle measure of the triangle

Answer 1

Which what?

Answer 2

options?

Answer 3

27 , 75, 78, 102

Answer 4

The sum of the exterior angles of a triangle, one exterior angle per vertex of the triangle, is 360. Two exterior angle measures are given: 153 and 105. That leaves
360 - (153 + 105) = 102 for the third exterior angle.