Answer:
B
Step-by-step explanation:
if angle A. and angle B are supplementary
the sum of 2angles ,
angle A + angle B =180 ,
if angle A is less than the angle B
in mathematics form,
let's angle A=X and angle B =X-40
then
angle A+ angle B =180
or, X+ (X - 40)=180
or, 2X=220
or, X=110
