#### Answer

True

#### Work Step by Step

By 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 $s=\dfrac{a+b+c}{2}$
This formula is used for computing the area of a triangle when the sides are known.
Therefore, the statement is true.