Geometry

Question Analysis:
This question assesses understanding of corresponding angles in congruent triangles.

Key Concept Explanation:
In congruent triangles, corresponding angles are equal.
The naming order indicates which angles correspond to each other.

Step-by-Step Solution:
From △PQR ≅ △STU, the correspondence is:
P ↔ S
Q ↔ T
R ↔ U
Therefore, ∠P corresponds to ∠S
Since m∠P = 45°, m∠S must also be 45°

Common Mistakes:
Mismatching corresponding angles due to naming order.
Assuming angle measures based on triangle ty...