1. The problem asks us to determine if given triangles are congruent, identify which triangles are congruent, and state the postulate that proves their congruency. 2. To prove triangles are congruent, we use congruence postulates such as SSS (Side-Side-Side), SAS (Side-Angle-Side), ASA (Angle-Side-Angle), AAS (Angle-Angle-Side), or HL (Hypotenuse-Leg for right triangles). 3. We compare corresponding sides and angles of the triangles. If all three pairs of sides are equal, SSS applies. If two sides and the included angle are equal, SAS applies, and so on. 4. Without specific triangle measurements or diagrams, we cannot definitively say which triangles are congruent or which postulate applies. 5. If you provide side lengths or angle measures, I can check congruency step-by-step using the appropriate postulate. Final answer: To determine congruency, compare sides and angles and apply the correct postulate (SSS, SAS, ASA, AAS, or HL).