Final answer:
A linear pair consists of two adjacent angles whose sum is a straight angle, measuring 180 degrees.
Step-by-step explanation:
A linear pair consists of two adjacent angles whose sum is a straight angle, which measures 180 degrees.
In a linear pair, the angles are formed by two intersecting lines, and they share a common vertex and a common side.
For example, if two lines, AB and CD, intersect at point E, then angles AED and CED form a linear pair because their sum is 180 degrees.