Question

If sides of a triangle are 26 cm 28cm and 30,find the area of the triangle

Answer 1

Answer is in attachment

Answer 2

in triangle abc, ab=26cm, bc=30cm, ac=28cm
perimeter=26+30+28
=84 cm
semi-perimeter=P/2
=84/2
=42cm
area=√s(s-a)(s-b)(s-c)
(s-a)=42-26=16
(s-b)=42-30=12
(s-c)=42-28=14
area=√42×16×12×14
=√2×7×3×4×4×2×2×3×7×2
=336cmsq.