### Video Transcript

Given that the two angles are
supplementary, find the value of 𝑥.

The diagram shows us an angle of 𝑥
and an angle of 89 degrees. Let’s begin by remembering that if
we have two angles which we’re told are supplementary, it means that they add up to
give us 180 degrees. This means that 𝑥 and 89 must sum
to 180 degrees. So we could, therefore, work out
the value of 𝑥 by calculating 180 degrees subtract 89 degrees. This would give us our answer that
𝑥 is equal to 91 degrees.