Another Area Formula
A remarkable formula discovered by the ancient Greeks tells us how to find the area of any triangle when only the side lengths are known. It is known as Heron's Formula, and involves the semi-perimeter, s. It can be proved using methods similar to the derivation of the Law of Cosines, but involves a lot of algebraic simplifications. A more interesting proof is given in the next activity.
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Date last modified: May 17, 2009.
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