In the photo of New York City's Chrysler Building at the right, TS ≅ ZY, XY ≅ RS, TR ≅ ZX, ∠ X ≅ ∠R , ∠T ≅ ∠ Z, ∠ Y ≅ ∠S , and Δ H G F ≅ ΔL K J .

a. Which triangle, if any, is congruent to ΔY X Z ? Explain your reasoning.