Find the length of side x in simplest radical form with a rational denominator.

Answer:
[tex] x = 2 \sqrt{5} [/tex]
Step-by-step explanation:
[tex] \sin \: 30 \degree = \frac{ \sqrt{5} }{x} \\ \\ \frac{1}{2} = \frac{ \sqrt{5} }{x} \\ \\x = 2 \sqrt{5} [/tex]