Question

A square is made using four rods of equal length joined end to end.

Answer 1

Answer:54 cm

Step-by-step explanation:

Given

Rods are joined to form a square

Perimeter of square is $72\ cm$

Suppose a is the length of each rod so

Perimeter is $4 a$

$\therefore 4a=72$

$\Rightarrow a=\frac{72}{4}$

$\Rightarrow a=18\ cm$

Now if rods are joined to form a square then

Perimeter is the sum of sides

Perimeter of (equilateral)triangle$=3a$

$\Rightarrow =3\times 18$

$\Rightarrow =54\ cm$