Question

Find the area of equilateral if its perimeter 9 cm

Answer 1

HERE IS YOUR ANSWER...⬇⬇

$\underline{SOLUTION}$ ➡

Let,

Length of each side = a

Given,

Perimeter = 9 cm

A.T.Q. ,

a + a + a = Perimeter

=> 3a = 9

=> a = 9/3

=> a = 3

•°• Length of each side = 3 cm.

Now,

Area of equilateral triangle =


$\sqrt{3} / 4 \times a {}^{2} \\ \\ = \sqrt{3} / 4 \times (3) {}^{2} \\ \\ = \sqrt{3} / 4 \times 9 \\ \\ = 9 \sqrt{3 } / 4$

$\underline{ANSWER}$ ➡ 9 $\sqrt{3}$ / 4 $\ cm {}^{2}$

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