Question

Find the length of a side of a square whose perimeter is:

a)12cm

b)10.4 cm

c)36m

d)7.2m​

Answer 1

Answer:

3 cm, 2.6 cm, 9 cm, 1.8 cm

Step-by-step explanation:

Let us suppose the side of the square is a cm.

So the perimeter is 4a.

(a) Given 4a = 12 cm

=> a = 12/4 cm

=> a = 3 cm

(b) Given 4a = 10.4 cm

=> a = 10.4/4 cm

=> a = 2.6cm

(c) Given 4a = 36 cm

=> a = 36/4 cm

=> a = 9 cm

(d) Given 4a = 7.2 cm

=> a = 7.2/4 cm

=> a = 1.8 cm

Answer 2

Answer:

a) $3cm$.

b) $2.6cm$.

c) $9cm$.

d) $1.8cm$.

Step-by-step explanation:

Let the length of of the side of a square is $'s'$.

Formula for the perimeter of square is: Perimeter $=4\times$ length of a side.

a) If perimeter of square is $12cm$:

$\implies4\times s=12$

$\implies s= \frac {12} {4}$

$\implies s =3cm$.

b) If perimeter of square is $10.4cm$:

$\implies4\times s=10.4$

$\implies s= \frac {10.4} {4}$

$\implies s =2.6cm$.

c) If perimeter of square is $36cm$:

$\implies4\times s=36$

$\implies s= \frac {36} {4}$

$\implies s =9cm$.

d) I perimeter of a square is $7.2cm$:

$\implies4\times s=7.2$

$\implies s= \frac {7.2} {4}$

$\implies s =1.8cm$.

Hence, length of sides of a square of given perimeters is:

a) $3cm$.

b) $2.6cm$.

c) $9cm$.

d) $1.8cm$.