Question

find the perimeter of an equilateral triangle whose side is 15 metre plss send answer with solution​

Answer 1

Given:-

An equilateral triangle with side 15cm.

Required Answer:-

The area of the triangle.

Formula used:-

$\sf \footnotesize{area \: of \: triangle = \frac{ \sqrt{3} }{4} {a}^{2} }$

Where a is the side of the given triangle.

Solution:-

We have, a = 15cm

$\sf \footnotesize{ \therefore \: area = \frac{ \sqrt{3} }{4} \times {15}^{2} }$

$\sf \footnotesize{ = \frac{ \sqrt{3} }{4} \times 225}$

$\sf \footnotesize{ = \frac{225 \sqrt{3} }{4} {cm}^{2} }$

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Answer 2

Given:-

• side of the triangle = 15m.

Formula:-

$\underline{\boxed {\sf perimeter \ of \ equilateral \ triangle = 3a}}$

Solution:-

$\implies$ perimeter = 3(15)

$\implies$ perimeter = 15m.