Question

Find the perimeter of a square of area. 49cm²​

Answer 1

Answer:

28 cm

Step-by-step explanation:

$given \: area \: = 49 {cm}^{2} \\ from \: the \: eqn \: of \: area \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = {a}^{2} where \: a \: is \: the \: side \: of \: the \: square \\ {a}^{2} = 49 {cm}^{2} \\ a = \sqrt{49} \\ \: \: \: \: a= 7 \\ \\ perimete \: of \: a \: square \: = 4a \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 4 \times 7 \\ \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: \: = 28cm$

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Answer 2

Area of square=49cm^2

We know that,

Area of square =side×side and all side of square are equal...

Let's take side be x

so,

49=x×x

49=x^2

x=√49

x=7

..

The side of square is 7cm

...

Perimeter of square=4×side

=4×7

=28cm...

...

So, the perimeter of square is 28cm..

...

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