Answer
$14.98 \ square \ units $
Work Step by Step
According to Heron's formula, the area of a triangle with sides $a,b$ and $c$ is given by:
$K=\sqrt{s(s-a)(s-b)(s-c)}$
where $s=\dfrac{a+b+c}{2}$
We have: $a=6, b=5, c=8$
So, $s=\dfrac{6+5+8}{2}=\dfrac{19}{2}=9.5$
In order to find the area of the triangle, we will have to substitute the data into Heron's formula.
$K=\sqrt{9.5(9.5-6)(9.5-5)(9.5-8)}=14.98 \ square \ units $