Answer
$179^{\circ}$
Work Step by Step
Subtracting $360^{\circ}$ from $539^{\circ}$, we obtain an angle with measure greater than $0^{\circ}$ but less than $360^{\circ}$. This angle is coterminal with $539^{\circ}$ and has the least positive measure.
$539^{\circ}-360^{\circ}=179^{\circ}$
