What is the measure of angle b?

Question

Exterior Angle adjacent to angle a that is 117 degrees

Angle A is unknown

Angle C is 81 degrees

Sorry for no picture, I try to post a picture but says that I don't have sufficient characters even though I do.

Answer 1

Angle A is a linear pair with exterior angle, so Angle A + exterior angle (117) = 180, so angle A = 63

Since the sum of the angles of a triangle is 180, angle B = 180 - 63 - 81 = 36