Question

Area of equilateral triangle is 21 under root 3 m2

Answer 1

area of triangle =21√3
√3/4 xa² =21√3
a² =21x4
a²= 84
a= √84
a = 2√21m

Answer 2

if we have to find the length of side, then the solution is,

area of equilateral triangle = side^2 (root3/4)

here, 21 root3 = side^2 (root3/4)

root 3 will cancel 

21= side^2/4

21*4 = side^2

84= side^2

9.16 =side


i hope this will help you



- by ABHAY