Answer :
It is given in the question that,
Sides or triangle ABC are:
BC = 13 cm
AC = 14 cm
AB = 15 cm
We know that,
Perimeter of triangle = Sum of all sides
= AB + BC + AC
= 15 + 13 + 14
= 42 cm
∴ s = 
= 
= 21 cm
Hence,
Area of 
= 
= 
= 
= 84 cm2
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