Question

what is the supplement measurement of a 115 degree angle?

Answer 1

The answer is 65. You take 180-115 for a supplementary angle. :)

Answer 2

The supplement is the angle that supplements another angle so that the two combined are equal to 180°. To find the supplementary angle, we find the difference of teh known angle and 180°:

180° - 115° = 65°

The supplementary angle is 65°.