sir

Dear Student,

 

The perimeter of an equilateral triangle of side a is given by 3a.

Also its altitude = √3a/2

 For the circle of radius r, Area = Πr²

So, Πr² = 154

=> r = 7cm

Also, r = 1/3 (√3a/2)

=> a = 2√3 r

=> a =14√3 cm

So, perimeter of triangle = 3a = 42√3 cm = 72.746 cm

 

Regards Topperlearning.