Question

The sides of a triangle are 21 20 and 13 cm. Find the area

Answer 1

This question is solved by heroin formula perimeter of triangle-2s=A+B+C
2S=21+20+13
2S=54
S=54/2
S=27
Now area of Triangle -
$\sqrt{s(s - a) \times (s - b) \times (s - c)} )y)))))$
here s is 27 and a=21,b=20,c=13
so,√27(27-21)×(27-20)×(27-13)
==√27×6×7×14
√27×3×2×7×7×2
2×7√3×9×3
14×3√3×3
42×3
=126cm,is correct answer
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I hope you are understanding