Math, asked by as2539818, 9 months ago

if the area of an equilateral triangle is 81 cube 3cm^2.find its perimeter.

Answers

Answered by vy19161916
3

Answer:

=54cm. Therefore, the perimeter of the equilateral triangle is 54 cm

Step-by-step explanation:

Area of equilateral triangle  = root 3 a^2

                     81 root 3        = root 3/4 a^2

                     1/4 a^2          = 81 root 3 / root 3

                            1/4 *a^2  = 81

                                  a^2    = 81*4

                                  a ^2   = 324

                                       a   = root 324

                                       a   = 18cm

Perimeter of triangle = 3*a                                 

                                = 3*18

                                = 54 cm

Therefore, the perimeter of the equilateral triangle is 54 cm.

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