To find the measure of angle \( m∠RWU \), we need to apply the properties of angles created when a transversal crosses parallel lines.
Given that \( PQ \parallel RS \) and \( m∠PVT = 109° \), we can analyze the transversal that intersects these parallel lines.
According to the properties of parallel lines cut by a transversal:
- Corresponding Angles: Angles located in the same position at each intersection are equal.
- Alternate Interior Angles: Angles located on opposite sides of the transversal but inside the parallel lines are equal.
- Consecutive Interior Angles: Angles located on the same side of the transversal (but inside the parallel lines) are supplementary, meaning they add up to 180°.
In this case, \( m∠PVT \) is given as \( 109° \).
Let's use the Corresponding Angles property:
- If \( m∠PVT = 109° \), then the corresponding angle \( m∠RWU \) (assuming that \( RW \) is parallel to \( PQ \) and \( RS \)) will be equal to \( 109°\).
Therefore, the answer is:
109°.