Question

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

Explanation:

Step1: Identify angle relationship

∠1 and ∠2 form a straight line.

Step2: Write the equation

Sum of angles on a straight line is 180°.
$m\angle1 + m\angle2 = 180^\circ$

Answer:

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