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In the given figure, $\angle 1$ and $\angle 2$ are supplementary angles.
If $\angle 1$ is decreased
Given:
$\angle 1$ and $\angle 2$ are supplementary angles.
To do:
We have to find the changes that should take place in $\angle 2$ so that both the angles still remain supplementary when $\angle 1$ is decreased.
Solution:
$\angle 1+\angle 2=180^{\circ}$
If $\angle 1$ is decreased by some degrees, then $\angle2$ must be increased by the same value so that the two angles remain supplementary.
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