Considering the triangles:
ΔABC and ΔAED
The corresponding sides are the following:
AB and AE
BC and ED
CA and DA
Side AB has a length of 7 units, this is the same length for side AE, which means that both sides are congruent AB ≅ AD
Sides CA and DA have one tick mark each, this indicates that both sides have the same length, then CA ≅ DA
Sides BC and ED have two tick marks, which indicates that they are equal, then BC ≅ ED
The corresponding sides are equal, so you can conclude that the triangles are congruent by Side-Side-Side (SSS)
Also, the angles ∠BAC and ∠EAD have the same mark, which indicates that they are congruent, so ∠BAC ≅ ∠EAD
Since two corresponding sides and the angles between them are congruent, that is:
AB ≅ AD
CA ≅ DA
∠BAC ≅ ∠EAD
You can conclude that the triangle is congruent by Side-Angle-Side