Question

example: name two linear pairs using the diagram below.

Explanation:

A linear pair consists of two adjacent angles that form a straight line (sum to $180^\circ$). Identify adjacent angle pairs sharing a side and lying on a straight line.

Answer:

1. $\angle 1$ and $\angle 2$
2. $\angle 2$ and $\angle 3$

(Other valid pairs include $\angle 3$ and $\angle 4$, $\angle 4$ and $\angle 1$)