Question

let the area of square is 9 cm square . what would be the new area if its side is reduced by 1 cm

Answer 1

area of a square=9cm^2
side=3 cm
New side=3-1 cm
=2 cm
New area=2*2=4 cm^2

Answer 2

The new area of square is $4cm^{2}.$

Step-by-step explanation:

Given,

The area of square = 9 cm square

To find,  the new area if its side is reduced by 1 cm = ?

Let the side of square = a cm

We know that,

The area of square $=a^{2}$

⇒ $a^{2}=9 cm^{2}$

⇒$a^{2}=(3cm)^{2}$

⇒ a = 3 c m

New side is reduced by 1 cm = 3 cm - 1 cm = 2 cm

∴ The new area of square$=(2cm)^{2}$

$=4cm^{2}$

Hence, the new area of square is $4cm^{2}.$