Question

find out the circumference,diagonal,and area of a square,whose side is 18cm​

Answer 1

circumference=sum of all side

circumference=18+18+18+18=72

diagonal=√18^2+18^2=25.45cm

area of square=side×side

area=18×18=324cm^2

Answer 2

The circumference, diagonal, and area of the square are 72 cm, $25.46$ cm,  $324 \ cm^2$ respectively.

Given,

A square has a side length of 18cm.

To Find,

The circumference, diagonal, and area of the square.

Solution,

The method of finding the circumference, diagonal, and area of the square is as follows -

Suppose that a square has a side length of x cm.

Then we know that the circumference of the square is $4x$ cm, the length of the diagonal is $\sqrt{2}x$ cm, and the area of the square is $x^2$ $cm^2$.

So the circumference of the given square is $4*18=72$ cm.

The length of the diagonal of the square is $\sqrt{2}*18=18\sqrt{2}=25.46$ cm (approximately).

The area of the square is $18^2=324$ $cm^2$.

Hence, the circumference, diagonal, and area of a square are 72 cm, $25.46$ cm, $324 \ cm^2$ respectively.

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