Question

Find the side of an equilateral triangle whose perimeter is 75 cm.

Answer 1

An equilateral triangle has its sides equal.

Perimeter of an equilateral triangle$=3a$ where $a$ is length of the side

Given $75=3a$

$\Rightarrow 3a=75$

$\Rightarrow a=\frac{75}{3}=25$cm

$\therefore$ Side of the equilateral triangle$=25$cm