Question

not graded
directions
answer the question below to check your understanding and move forward in the course! this quiz is not graded.
the measure of ∠1 is 39°. what is the measure of ∠4?
image of angles with a transversal
select the correct answer
39°
141°
52°
78°

Explanation:

Step1: Identify Angle Relationship

$\angle1$ and $\angle4$ are supplementary (form a linear pair), so their measures add to $180^\circ$.

Step2: Calculate $\angle4$

Using the formula $m\angle4 = 180^\circ - m\angle1$. Substitute $m\angle1 = 39^\circ$:
$m\angle4 = 180^\circ - 39^\circ = 141^\circ$.

Answer:

$141^\circ$ (assuming the intended correct option is the one with 141°, likely a typo in the options as 141° makes sense here)