Consider angle C is congruent to angle D, moreover, you can notice that right angle E is the same for both triangles.
Due to you have two congruent angles, it is necessary that angle B is congruent to angle A, because angle A and B are the result of 180° minus the sum of the other angles of each triangle.
The previous demands that all sides of both triangle sare congruent (furthermore, due to E is the midpoint of CD).
Hence, from the given statement, you can conclude that side AC is congruent to side BD:
AC ≅ BD
