Question

what is the area of triangle of herons formula

Answer 1

First find S 
S= 1/2 x ( a+b+c )

then Area by using the below Formulae 
A= $\sqrt{s(s-a)+(s-b)+(s-c)}$

Answer 2

Area=sqrt[s(s-a)(s-b)(s-c)] where s= a+b+c/2 a,b and c are length of sides of triangle s is the semi perimeter