Question

If the perimeter of an equilateral triangle is $18cm,$find the length of its each sides.

Answer 1

let the side of equilateral triangle be $x.$

So, perimeter $=3\times x$

$=3x$

Now,

$$\begin{gathered} 3x=18 \\ \Rightarrow x=\frac{18}{3} \\ \Rightarrow x=6cm \end{gathered}$$

Hence, length of side $=6cm$