Question

find the area of a square whose side is 3.5 centimetres​

Answer 1

Step-by-step explanation:

given side of square = 3.5cm

perimeter of square = 4 × side

= 4 × 3.5

=

\large\boxed{14 \: cm}

14cm

Hope you understand

now , area of the square = 4 × side²

= 4 × 3.5 × 3.5

=

\large\boxed{49 \: {cm}^{2} }

49cm

2

Answer 2

Answer:

Hence the area of a square is $12.25cm^2.$

Step-by-step explanation:

According to the data given in the question,

It is given that, the side of a square is $3.5$ cm,

We have to find the area of a square,

Here we have to use the formula of area of a square,

The area is equal to side square, i.e. ${\text } A = a^2$

Where a is the side of the square,

Given: a= $3.5$ cm,

Substitute the value in the formula of area of a square, we get

${\text } A = (3.5)^2$

Squaring a number is to multiply the number by itself we get,

${\text } A = 3.5\times 3.5$

Multiply $3.5$ and $3.5$ we get

${\text } A = 12.25cm^2$

Hence the area of a square is $12.25cm^2.$