Question

the area of equilateral triangle is 81 root 3 m square find its side​

Answer 1

given that

we know that area is √3/4 a²

area of the equilateral triangle = 81√3

√3/4 a² = 81√3

1/4 a² = 81

a² = 81(4)

a² = 324

a = 18cm

then the perimeter of the equilateral triangle = 3×a

= 3×18

=54cm.

Answer 2

Step-by-step explanation:

A= √3/4 (side) ^2

81√3=√3/4(side)^2

81×4=(side)^2

side=9×2

side=18

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