Final answer:
To accurately determine the relationship between △DEF and △D′E′F′, specific information about their sides and angles is needed, which is not provided in the question.
Step-by-step explanation:
To determine the relationship between △DEF and △D′E′F′, we need to examine the properties of the triangles mentioned in the question.
Without additional information about the sides and angles of these triangles, we cannot confidently identify the correct relationship.
However, based on the provided reference information that suggests relationships between other triangles such as similar triangles and congruence, we might infer there could be some geometric relationship such as similarity or congruence between △DEF and △D′E′F′.
To identify which one specifically, we would need more details about the triangles, such as the lengths of their sides or the measures of their angles.