\"\"

\

The given side lengths are \"a

\

Apply Pythagorean theorem: \"a

\

\"\"            (Substitute \"a)\"\"

\

\"4              (Evaluate powers: \"2)

\

\"13                 (Add: \"4)

\

The equality is false, So not a right traingle.\"\"

\

The traingle with the given side lengths is not a right traingle.