## anonymous one year ago in triangle abc, a=39m, b=27m, and c=42m. find the area

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Hello @jjcornm and Welcome to OpenStudy! :) It seems that you are missing some information in your problem :-/ If it is a diagram or picture please do include it so that us helpers can help you quickly and efficiently :)

2. amoodarya

$S=\sqrt{p(p-a)(p-b)(p-c)}\\where\\p=\frac{a+b+c}{2}$ heron's formula