Answer: d. d. segment BC ≅ segment EF
Step-by-step explanation:
The SAS Postulate says that if two sides and the included angle of one triangle are congruent to the corresponding two sides and the included angle of another triangle, then the triangles are said to be congruent.
In the given figure , we have two triangles ΔABC and ΔDEF in which
∠B≅∠E
segment AB ≅segment ED.
According to the SAS postulate, the additional information would be needed to prove that ΔABC ≅ ΔDEF will be : segment BC ≅ segment EF
∵ ∠B is the included angle between segment BC and segment AB and ∠E is the included angle between segment EF and segment ED.