1. The problem states that triangles ABC and DEF must be congruent based on the information marked in the diagram. 2. To determine if two triangles are congruent, we use congruence criteria 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. Since the problem does not provide specific side lengths or angle measures, we cannot apply any of these criteria directly. 4. Without explicit information about corresponding sides or angles being equal, we cannot conclude that ABC and DEF are congruent. 5. Therefore, the statement that ABC and DEF must be congruent is false based on the given information. Final answer: B. False