The congruence postulate/theorem that proves both triangles are congruent is the : B. SAS.
What is the SAS?
The SAS is a congruence theorem of a triangle which states that two triangles are congruent if two corresponding sides and a pair of corresponding included angles in both triangles are congruent.
The diagram shows two pairs of corresponding congruent sides and a pair of corresponding congruent included angles. Therefore, the triangles are congruent by: SAS.
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