Question

The perimeter of an equilateral triangle is $45$ cm. Find the length of each side of the equilateral triangle.

Answer 1

Perimter$=$sum of all lengths of sides of triangle

$\Rightarrow$ Perimeter $=3a$ $\{a=$ side of triangle $\}$

$\Rightarrow 45=3a$

$\Rightarrow a=15cm$.