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Find area of equilateral triangle if …

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Find area of equilateral triangle if it's perimeter is 9cm

Posted by Niyati Sonekar 1 year, 1 month ago

CBSE > Class 09 > Mathematics

3 answers

A M 1 year, 1 month ago

6.75 is the correct answer

0Thank You

Md Anas Ibrahim 1 year, 1 month ago

USE FORMULA 3/4a2² Where a= sides of triangle

0Thank You

Mrunal Pawar 1 year, 1 month ago

P=9 so S=4.5 and as it is equilateral triangle all sides are equal i.e 3cm. By herons formula of√S(s-a)(s-b)(s-c) √4.5(4.5-3)(4.5-3)(4.5-3) = √4.5*1.5*1.5*1.5= √15.1875=3.89 approx

2Thank You

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CBSE > Class 09 > Mathematics