We know that this triangle is 30-60-90 degree triangle, and the measurements for 30-60-90 triangle is x+2x =
![\sqrt[x]{3}](https://img.qammunity.org/2019/formulas/mathematics/high-school/too2pd41as7pxyfqgw2iucn7djwm3a4uiq.png)
X is the base (bottom of the triangle)
2x is the height
![\sqrt[x]{3}](https://img.qammunity.org/2019/formulas/mathematics/high-school/too2pd41as7pxyfqgw2iucn7djwm3a4uiq.png)
is the hypotenuse.
Knowing this, I would say the answer is B, because 2x=12, so x=6, so the answer would be
![\sqrt[6]{3}](https://img.qammunity.org/2019/formulas/mathematics/high-school/erb12a4947c4f7zs3wsziack1x5a6ac8gz.png)
.
Hope this helps!