write herons formula and explain it terms?
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In geometry, Heron's formula (sometimes called Hero's formula), named after Hero of Alexandria, gives the area of a triangle when the length of all three sides are known. Unlike other triangle area formulae, there is no need to calculate angles or other distances in the triangle first.
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root of :s(s-a)(s-b)(s-c) semi perimeter =a+b+c÷2
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