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2014-06-18T14:04:12+05:30

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Heron's formula is to get are of scalene triangle[√ (s)(s - a)(s-b)(s-c) 
where s is semi-perimeter (half of the total perimeter of the triangle )
a, b,c are the lengths of the three sides of the triangle.
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2014-06-18T14:06:08+05:30
Where a,b,c are sides of triangle.
S=semiperimeter=a+b+c/2

 \sqrt{S(S-a)*(S-b)*(S-c)}
1 5 1