In a right triangle, one of the exterior angles measures 155°. What is the measure of the non-adjacent, non-right angle?

Supplementary angles equal to 180

So, adjacent angle + exterior angle = 180

adjacent angle = 180 - 155 = 25

Now, non-adjacent + adjacent = 90

non-adjacent = 90 - 25 = 65

So 65 degrees is your answer.