Question

in the figure below, m∠1 = 125°. find m∠2.

Explanation:

Step1: Identify angle - relationship

$\angle1$ and $\angle2$ are supplementary angles.

Step2: Use supplementary - angle property

Supplementary angles add up to $180^{\circ}$. So $m\angle2=180^{\circ}-m\angle1$.

Step3: Substitute the value of $m\angle1$

Given $m\angle1 = 125^{\circ}$, then $m\angle2=180 - 125$.
$m\angle2 = 55^{\circ}$

Answer:

$55$