If the lengths of three sides of a triangle are known, then the following formula, known as
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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 = 5 ft, b = 8 ft, c = 10 ft
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A = Vs(sa) (s - b)(sc) where a, b, and c are the given lengths of the sides, and s = 0.5(a + b + c). Use this formula to find the areas (correct to the nearest square foot) in Problems 51-53.
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