Determine which postulate or theorem can be used to prove that lmn nol

The theorem of SSS  can be used to prove that LMN NOL are congruent triangles.

Step-by-step explanation:

SSS theorem states that if two triangles have all their corresponding sides congruent, both triangles are congruent.

From the graph ON= LM

Also OL = NM

Finally the diagonal of the polygon is the third side of both triangles so the hypotenuse is equal for both triangles, therefore, by the SSS theorem triangles LMN and NOL are congruent