Answer:
[tex]2\sqrt{10}[/tex]
Step-by-step explanation:
Take [tex]a^{2} +b^{2} +c^{2}[/tex], let x represent a, 9 represent b, and 11 represent c.
Now, plug your variables into the equation:
[tex]x^{2} +9^{2} =11^{2}[/tex]
Simplify:
[tex]x^{2} +81=121[/tex]
Subtract:
[tex]x^{2} =40[/tex]
Take the square root of 40:
[tex]x=2\sqrt{10}[/tex]
