Question

Area of a square = 81 sq km; side=
please answer this​

Answer 1

Step-by-step explanation:

The formula for area of a square is:

s

2

=

A

where A=area and s=length of a side.

Hence:

s

2

=

81

s

=

√

81

Since

s

has to be a positive integer,

s

=

9

Since the diagonal of a square is the hypotenuse of a right-angled triangle formed by two adjacent sides, we can calculate the length of the diagonal using the Pythagorean Theorem:

d

2

=

s

2

+

s

2

where d=length of the diagonal and s=length of a side.

d

2

=

9

2

+

9

2

d

2

=

81

+

81

d

2

=

162

d

=

√

162

d

=

12.73

Answer 2

$\underbrace \text{Answer:}$

Formula used:-

• Area of the square: side×Side
• Side of the square: √area

Solution:-

Given,

Area = 81sq.km

$\sf{Side} = \sqrt{81}$

$\: \: \: \: \: \: \: \: \: = \bf \red{9km}$

⛬ The side of the square is 9km.