Question

if the area of an equilateral triangle is 81 under root 3 cm square find its perimeter

Answer 1

The Area Of An Eq. Triangle Is = (√3/4)*a^2

So by equaling It To The Data Given Above (81√3) we get a=18 cm.

Now ,
Perimeter Of Eq. Triangle Is = 3a,
So,
Perimeter = 3*18 =54 cm.

^_^