Question

What are the criteria for the triangle to be congruent?

Answer 1

SAS ,SSS, ASA both angles must have to apply these congruency rule

Answer 2

The triangles must have all 3 side to be equal ( SSS congruency )
The triangle must have 2 sides and 1 induced angle to be equal ( SAS congruency.
The triangles must have 2 angles and 1 induced sides to be equal (ASA congruency. )
Similarly  AAS Is also possible , but note AS is not a criteria.