Question

Given side AB in ΔABC has length x, what is the length of side AC?

Answer 1

use trigonomeytry

sin 30 = AB / AC
= x / AC
AC = x / sin 30

Answer 2

In the 30-60-90 special right triangle, the side opposite the 30 degree angle is 1/2 the hypotenuse.

Answer 3

If the side opposite the 30 degree angle is x, as is the case in your problem, the hypotenuse must be 2x

Answer 4

oh - yep - forgot that