Question

The side of an equilateral triangle is shown by $l$. Express the perimeter of the equilateral triangle using $l$.

Answer 1

An equilateral triangle is a triangle with three equal sides.

Given, side of the equilateral triangle = $l$

Perimeter is the total sum of lengths of all the bounding sides of a planar object.

$\therefore$ Perimeter of an equilateral triangle =$3\times sidelength$ = $3l$