Question

If the length of the sides of a triangular plot of land are 20 m, 21 m amd 13 m, what is its area?

Answer 1

Hello dear Arya

HERE IS YOUR ANSWER

In triangle abc

Side of triangular plot of land =
a = 20m
b = 21m
c = 13m

Semi perimeter (s) of triangle = (a+b+c) / 2
= (20+21+13)/2 m = 54/2 m = 27 m

By heron's formula,

Area of triangle = Root of [ s ( s-a) (s-b) (s-c)] m²
= Root of [27 ( 27-20)(27-21)(27-13)]m²
= Root of [ 27×7×6×14]m²
= Root of [3×3×3×7×2×3×2×7]m²
= 3×3×7×2 m²
= 126 m²

Hence,

Area of triangular plot = 126 m² ans. ✅✅

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Answer 2

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