To identify if two triangles are congruent, their corresponding parts can be compared. The triangles are congruent if all the angles and sides are congruent with their counterpart.
The congruent angles are the ones with the same number of arcs. In this case, they are
∠A≅∠D,∠B≅∠E,and∠C≅∠F.
For the sides, hatch marks are used to show that they are congruent. The following pairs of sides are congruent.