Question: User: line FH \parallel line QS and line TV \parallel line FH. Complete the proof that \angle PRS \cong \angle TUW.
1. **State the problem:** We are given that line $FH \parallel QS$ and line $TV \parallel FH$. We need to prove that $\angle PRS \cong \angle TUW$.
2. **Given statements:**
- $FH \parallel QS$ (Given)
- $TV \parallel FH$ (Given)
3. **Step 3:** $\angle TUW \cong \angle FGW$ by the **Alternate Exterior Angles Theorem** because $TV \parallel FH$ and $UW$ is a transversal.
4. **Step 4:** $\angle FGW \cong \angle PRS$ by the **Alternate Exterior Angles Theorem** because $FH \parallel QS$ and $GW$ is a transversal.
5. **Step 5:** By the **Transitive Property of Congruence**, since $\angle TUW \cong \angle FGW$ and $\angle FGW \cong \angle PRS$, it follows that $\angle PRS \cong \angle TUW$.
**Final conclusion:** $\boxed{\angle PRS \cong \angle TUW}$