When two lines intersect, they create four angles. The angles that are opposite each other (also known as vertical angles) are equal in measure.
Given that \( m\angle 2 = 110^\circ \), the angle opposite to it, which is \( \angle 4 \), will also be \( 110^\circ \).
Thus, the answer is:
\(\angle 4\) is also \( 110^\circ \).