Question

A piece of wire is $60cm$ long. What will be the length of each side if the string is used to form:
an equilateral triangle.

Answer 1

Given

length of string$=60$cm

If the string is used to form an equilateral triangle then the perimeter of the triangle$=$length of the string

Let the side of the triangle be a

$\frac{a+a+a}{2}=60$

$\frac{3a}{2}=60$

$3a=60$

$a=20$.