Respuesta :

Answer:

Yes it is a right triangle.

Step-by-step explanation:

Because the Pythagorean Theorem states that [tex]a^{2} +b^{2} =c^{2}[/tex]

[tex]85^{2}=7225\\84^{2}=7056\\13^{2}=169\\7056+169=7225[/tex]