Question

Find the perimeter of an equilateral triangle whose area is 9 cm​

Answer 1

Answer=Side of equilateral triangle =9cm

then Perimeter =3× side

=3×9

[Perimeter =27cm]

Answer 2

Answer(θ‿θ)

Perimeter of an equilateral triangle whose area is = 9cm

Area of equilateral triangle is = √3/4a²

= √3/4 (9)²

= √3 / 4 × 9× 9

= 561.184cm

All the best :)