Question

Using herons formula find the area of an equilateral triangle of side 4 √3 cm.​

Answer 1

Answer:

20.78 approx

Step-by-step explanation:

Herons formula=√{s(s-a)(s-b)(s-c)}

and s=(a+b+c)/2

so,

s= (3* 4√3)/2 = 6√3

now s-a=s-b=s-c= 6√3- 4√3 = 2√3

therefore,

area=√(6√3*2√3*2√3*2√3)

      = √432

      =20.78