Vertical Angle B42B3B

1. The problem asks us to find the angle vertical to $\angle 4$ formed by two intersecting lines. 2. When two lines intersect, they form two pairs of vertical (opposite) angles. Vertical angles are equal in measure and are opposite each other at the intersection point. 3. Given the angles labeled around the intersection as $\angle 1$ (bottom), $\angle 2$ (left), $\angle 3$ (top), and $\angle 4$ (right), the vertical angle to $\angle 4$ is the angle directly opposite it. 4. Since $\angle 4$ is on the right, the angle opposite it across the intersection is $\angle 2$ on the left. 5. Therefore, the angle vertical to $\angle 4$ is $\angle 2$. Final answer: $\boxed{\angle 2}$