B is the answer
You should get the app CY math
108/12 = 9 so when y = 108 x = 9×2 which = 18 so when y =108 x = 18
I gotchu !! just give me a moment to write it out
see the attached figure to better understand the problem
we know that
The equilateral triangle has three equal sides
so
in the equilateral triangle ABC

the height of the triangle is the segment BD
in the right triangle BCD
Applying the Pythagorean Theorem

solve for BD

substitute the values



therefore
<u>the answer is</u>
the height of the triangle is 