Which of the following congruence statements does not prove that two triangles are congruent? asa sas ssa sss

There are three postulates that can be used to prove two that two triangles are congruent. 

ASA or Angle-Side-Angle: If two corresponding interior angles of two triangles and the included sides are congruent, the triangles are congruent.

SAS or Side-Angle-Side: If two corresponding sides of two triangles and the included angles are congruent, the triangles are congruent.

SSS or Side-Side-Side: If three corresponding sides of two triangles are congruent, the triangles are congruent.

SSA is not a congruence statement.