Question

write an equation to show how m∠1 and m∠2 are related.

Explanation:

Step1: Identify angle - pair relationship

$\angle1$ and $\angle2$ are adjacent angles on a straight - line.

Step2: Recall angle - sum property

The sum of adjacent angles on a straight - line is $180^{\circ}$.

Answer:

$m\angle1 + m\angle2=180^{\circ}$