The measure of Angle B is 68° what is the measure of it supplementary angle

a. 22°

b. 90°

c. 112°

d. 180°

"Supplementary angles" means two angles that add up to 180°.

(Any angle) + (its supplement) = 180°.

(Angle B) + (its supplement) = 180°.

(68°) + (its supplement) = 180°

Subtract (68°) from each side: Its supplement = 180° - 68°

= 112°.