The supplementary angle of the angle given in the figure is -
The given angle is 40∘.
Its supplementary angle is 180∘−40∘=140∘
The supplementary angle of the angle given in the figure is ___.
In the given figure, ∠1 and ∠2 are supplementary angles. If ∠1 is decreased, what changes should take place in ∠2 so that both the angles still remain supplementary.