Question

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what is the measure of an exterior angle of a regular octagon?
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Explanation:

Step1: Recall exterior - angle formula

The sum of exterior angles of any polygon is 360°.

Step2: Divide by number of sides

For an octagon, $n = 8$. So, $\frac{360^{\circ}}{8}=45^{\circ}$.

Answer:

$45$