Question

find the length of one side of an equilateral triangle if it's perimeter is 22.5 cm​

Answer 1

Let the side of equilateral triangle be a

3a=22.5

a=22.5/3

a=7.5 cm

Follow me if it is correct

Answer 2

$\huge\mathbb{\red{SOLUTION:-}}$

We know that the side of equilateral triangle are equal .

and we also know that the perimeter of triangle=sum of all. sides

$\mathtt{\underline{\underline{\red{According\:to\: question:-}}}}$

Let the side of triangle be x

$\sf x+x+x= 22.5\\ \\ \sf 3x=22.5\\ \\ \sf x=\frac{22.5}{3}\\ \\ \sf\leadsto x= 7.5$

The one of of a triangle is 7.5 cm then the other two sides are also equal

Verification:-

$\mathtt{Perimeter=sum\:of\:all\:sides}$

Perimeter= 7.5+7.5+7.5

22.5= 22.5cm

L.H.S =R.H.S

$\large\mathtt{\underline{\red{Side\:of\: triangle=7.5cm}}}$