Geometry help

Hey Guest! 

 

This is a basic trigonometrey relationship. 

 

We use cosine in this case, where cosine is adjacent over hypotenuse. 

 

\(\cos{30º}=\frac{x}{10}\)

\(\frac{\sqrt3}{2}=\frac{x}{10}\)

\(x=\boxed{5\sqrt3}\)

 

I hope this helped,

 

Gavin