Question

The perimeter of an equilateral triangle is 3x cm, what is its area

Answer 1

3×side =.....
3×length

Answer 2

As the perimeter is 3x cm.
Therefore,
Length of one side= 3x÷3
i.e.
$x = 3$
As we know formula for area of an equilateral triangle=
$\frac{ \sqrt{3} }{4} \times {side}^{2}$
So, applying it we get:
$\frac{ \sqrt{3} }{4} \times {x}^{2}$

$= \frac{ \sqrt{3} {x}^{2} }{4} \: \: ans.$