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Find the area of equilateral triangle …

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Find the area of equilateral triangle whose side is x cm

Posted by Rajat Jain 8 years, 4 months ago

CBSE > Class 09 > Mathematics

1 answers

Soumya Ghoshal 8 years, 3 months ago

Let the side x cm.

Semi-Perimeter ={tex}\frac{{(x+x+x)}}{2}=\frac{{3x}}{2}{/tex}cm

Now , area of the equilateral triangle is

= {tex}\sqrt{{(3x/2)(x/2)(x/2)(x/2)}}{/tex}

={tex}\frac{{√3x^2}}{4}{/tex}cm²

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