ASA Criterion means that the triangles are congruent if the corresponding Angle-Side-Angle is also congruent.
From the the Triangle ABC :
[tex]\angle C-BC-\angle D[/tex]
corresponds with ASA.
Likewise from the Triangle DEF :
[tex]\angle F-FE-\angle E[/tex]
Since the given figure already states that :
and BC = FE
The other item that will complete the ASA will be :
SAS criterion means that the triangle are congruent if the corresponding Side-Angle-Side are also congruent.
The following corresponds with SAS :
From the triangle ABC :
[tex]CA-\angle C-BC[/tex]
From the triangle DEF
[tex]DF-\angle F-EF[/tex]
