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Area of a Triangle - by Heron's Formula

The perimeter...

Question

The perimeter of an equilateral $△ A B C$ is $41.36 c m$ . Find the area of triangle $A B C$

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Solution

We know that
Area of equilateral triangle $= \frac{\sqrt{3} P^{2}}{36}$
$\Rightarrow$ $\frac{\sqrt{3} {(41.36)}^{2}}{36}$
$\Rightarrow$ $82.5 s q . c m$

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Area of a Triangle - by Heron's Formula

Standard VII Mathematics

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