If the lengths of three sides of a triangle are known, then the following formula, known as Hero's (or Heron's) formula, is sometimes used: A = s(s − a)(s − b)(s − c) where a , b , and c are the given...

If the lengths of three sides of a triangle are known, then the following formula, known as Hero's (or Heron's) formula, is sometimes used:

wherea,b, andc are the given lengths of the sides, ands = 0.5(a +b +c). Use this formula to find the area (correct to the nearest square foot).

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