To determine the measure of an exterior angle \( x \) of a triangle, you can use the following property:
The measure of an exterior angle of a triangle is equal to the sum of the measures of the two non-adjacent interior angles.
If you have the measures of the two non-adjacent interior angles, you can calculate the exterior angle \( x \) using this formula:
\[ x = \text{Interior Angle 1} + \text{Interior Angle 2} \]
If you provide the measures of the interior angles or any additional information, I can help you find the exact value of \( x \).