Question

If the perimeter of an equilateral triangle is 84cm, find its area.​

Answer 1

3a = 84

a = 28 CM

area = √3/4× 28 × 28 = 186√3

Answer 2

perimeter of equilateral ️=sum of all sides

" " " " " " " " " " " = 84 cm

let the one side be x

All sides of equilateral ️ are equal

A.T.Q

x+x+x = 84

3x = 84

x = 84/3

x = 28

: all sides of equilateral ️= 28 cm