Which pair of angles are vertical angles?
∠RQW and ∠WQV
∠RQW and ∠TQU
∠RQS and ∠SQU
∠RQT and ∠TQV

The pair of angles that are vertical angles are ∠RQW and ∠TQU
Vertical angles are pair of opposite angles formed by intersecting lines.
Vertically opposite angle are congruent.
Vertical angles share the same vertex point.
Therefore, the pairs of vertical angles are as follows:
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