Question

9/22 -angles mixed practice if ∠4 = 73°, what is the measure of ∠3? m∠3 =

Explanation:

Step1: Recall angle - pair relationship

$\angle4$ and $\angle3$ are supplementary angles.

Step2: Use supplementary - angle formula

Supplementary angles add up to $180^{\circ}$. So $m\angle3=180^{\circ}-m\angle4$.

Step3: Substitute the value of $\angle4$

Given $m\angle4 = 73^{\circ}$, then $m\angle3=180 - 73$.

Step4: Calculate the result

$m\angle3 = 107^{\circ}$

Answer:

$107^{\circ}$