Adjacent supplementary angles are pairs of angles that are next to each other (adjacent) and together sum up to 180 degrees (supplementary).
To break it down further, ‘adjacent’ means that the angles share a common arm (or ray) and a vertex. For example, if you have two angles formed by two intersecting lines, and they are located next to each other, they are considered adjacent. If the sum of their measures equals 180 degrees, then these angles are also supplementary.
One common example is when two angles are formed on a straight line. Imagine a straight line where one angle is 110 degrees; the adjacent angle would then measure 70 degrees, because 110 + 70 = 180 degrees. This property is fundamental in geometry, as it helps in solving for unknown angles and understanding the relationships between angles in various geometric figures.