When given three sides of a triangle \(\; a,\ b, \ c\).- Semiperimeter is one half of the perimeter.
area of a Heron's formula |
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\(\large{ A= \sqrt { s\;(s-a)(s-b)(s-c) } }\) \(\large{ s \equiv \frac{1}{2} \;(a+b+c) }\) (semiperimeter) |
Perimeter of a Heron's formula |
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\(\large{ p = a+b+c }\) \(\large{ s \equiv \frac{1}{2}\; p }\) (semiperimeter) |
