Question

I have a hard time finding the x help

Answer 1

The volume of a triangular prism is V = 1/2lwh. So, in order to find x, plug in the values you know and solve:
$576 = \frac{1}{2}*8*8*x$
$1152 = 64x$
$x = 18$

Answer 2

The formula for the volume of this shape is: length * width * height/2

Knowing this, we can set up this equation:

$576= \frac{8*8*x}{2}$

Now, we can solve for x.  I will start by multiplying the 8s and then divide both sides by two.

$1152=64x$

Next, we divide both sides by 64 to find x.

$x = 18$

So, x is equal to 18 cm.