To determine which angle is vertical to \(\angle 7\), we need to identify the relationships between the angles. Vertical angles are formed when two lines intersect and are opposite each other. Therefore, if \(\angle 7\) is known, the angle that is opposite it at the intersection is the vertical angle.
Without a diagram, I can't tell definitively which angle corresponds to \(\angle 7\). However, if you know the layout of the angles, you can identify the vertical angle as the one that is directly across from \(\angle 7\).
Please refer to a diagram if possible, or provide more information about the arrangement of the angles, so I can help you better!