Find the area of a triangle whose sides are `13 c m ,14c m ,15cm`

Explanation

We know that area of any triangle is given by `A= sqrt [s(s-a)(s-b)(s-c)]`, where s is semi perimeter, `a,b,c` are sides of triangle.
= `sqrt [(21)(21-13)(21-14)(21-15)]`
= `sqrt [21(8)(7)(6)]`
=84 sq cm `.