To find the measure of an exterior angle \( x \), we typically use the property that the exterior angle is equal to the sum of the two opposite interior angles. Without specific information about the interior angles or the type of polygon involved, I cannot give a numerical answer for \( x \).
If you can provide additional details, such as the measures of the interior angles or the type of polygon you are dealing with, I'll be able to help you calculate the value of the exterior angle.