Find the length of the third side. If necessary, write in simplest radical form.

Answer:
[tex]4[/tex]
Step-by-step explanation:
[tex]by \: pytogorus \: law \\ \\ {8}^{2} = {x}^{2} + { (4\sqrt{3} })^{2} \\ {x}^{2} = {64 - 48} \\ x = \sqrt{16} \\ x = 4[/tex]