Question

3 find the angle measure. ∠5 and ∠6 are supplementary angles, and $m\angle 5 = 78^\circ$. find $m\angle 6$. $m\angle 6 = \square ^\circ$

Explanation:

Step1: Recall supplementary angles sum

Supplementary angles sum to $180^\circ$.

Step2: Subtract known angle from 180

$m\angle6 = 180^\circ - m\angle5$
$m\angle6 = 180^\circ - 78^\circ$

Step3: Calculate the difference

$m\angle6 = 102^\circ$

Answer:

$102$