Find the to two decimal places.
if the area of an equilateral triangle is 81 v3 cm?, find its perimeter

54 cm

Step-by-step explanation:

The area (A) of an equilateral triangle is

A =  ( s is the side length ) then

= 81 ( multiply both sides by 4 to clear the fraction )

s² = 324 ( divide both sides by )

s² = 324 ( take the square root of both sides )

s = = 18

Thus

perimeter = 3 × 18 = 54 cm

step-by-step explanation:

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