• The same-side interior angles ∠A, and ∠B are congruent orderly to ∠D and ∠F.
And the Remote interior angle ∠C from ΔABC is congruent to the Remote Interior angle ∠D of triangle ΔDEF.
1) As congruent triangles have three congruent angles and sides in order, then we state that, using this specific vocabulary:
2) Δ ABC is congruent to ΔDEF, because
• The same-side interior angles ∠A, and ∠B are congruent orderly to ∠D and ∠F.
And the Remote interior angle ∠C from ΔABC is congruent to the Remote Interior angle ∠D of triangle ΔDEF.
3) Hence, that's the answer.