Question 93618
Heron's area formula: {{{Area=sqrt(s(s-a)(s-b)(s-c))}}}
    Where{{{s=((a+b+c)/2))}}}

Let a=18, b=27, c=36

s=(18+27+36)/2=40.5

{{{A=sqrt(40.5(40.5-18)(40.5-27)(40.5-36))=235.284}}}

Ed Jones