which angle number represents the linear pair of ∠sxt?

which angle number represents the linear pair of ∠sxt?
Answer
Explanation:
Step1: Recall linear - pair definition
Two angles form a linear pair if they are adjacent and their non - common sides form a straight line.
Step2: Identify adjacent angle to ∠SXT
∠SXT and ∠RXS are adjacent angles and their non - common sides (ray XT and ray XR) form a straight line.
Answer:
∠RXS (assuming angle 3 is ∠RXS based on the standard naming convention for angles formed by intersecting lines in the given figure)