If triangle PAG is congruent to triangle DEN, it means that the two triangles are identical in size and shape. This means that the following conclusions can be made based upon the given information:
The corresponding sides of triangle PAG and triangle DEN are equal in length. This can be expressed using the symbol "=": PA = DE, AG = EN, and GA = ND.
The corresponding angles of triangle PAG and triangle DEN are equal in measure. This can be expressed using the symbol "≅": ∠PAG ≅ ∠DEN, ∠AGP ≅ ∠NDE, and ∠GPA ≅ ∠END.