Main post link -> http://www.mathisfunforum.com/viewtopic.php?id=19641
Check it out. Its cool.
4 years, 4 months ago
There's a better proof.. http://www.artofproblemsolving.com/Resources/articles.php
(Look for heron's formula)
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Woah but its still a fairly advanced proof involving complex number geometry, but I love it! And Agnishom, the author of the MathIsFun proof intermediately proves the law of cosines which is a step in the most common proof presented with Heron's formula.
There was another method of proving it.. it was in AoPS precalc.
We have alredy done it in our tuition