To find the measure of the exterior angle \( x \), we can use the fact that an exterior angle of a triangle is equal to the sum of the two opposite interior angles.
Given the angles:
- One interior angle is \( 40^\circ \)
- The other interior angle is \( 70^\circ \)
According to the exterior angle theorem:
\[ x = 40^\circ + 70^\circ \]
Calculating the sum:
\[ x = 110^\circ \]
Thus, the measure of the exterior angle \( x \) is \( 110^\circ \).
So, \( x = 110^\circ \).