Question

Length of side of a triangle are 5cm 12 cm 13 cm it's area is

Answer 1

A =5
B=12
C=13
area=30cm2

Answer 2

a= 5 cm
b= 12cm
c= 13cm
s=(a+b+c)/2=(5+12+13)/2= 30/2= 15
area formula=$\sqrt{s(s-a)(s-b)(s-c)}$
=$\sqrt{15(15-5)(15-12)(15-13)}$
=$\sqrt{15(10)(3)(2)}$
=$\sqrt{3*5*2*5*3*2}$
=3×5×2
=30cm²
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