The area of a square is 289 $$cm^2$$​. Find the length of its diagonal.

Correct option is A

Given:

The area of the square = 289 $$cm^2$$​​

Formula Used:

The area of the square = $$a^2$$​​

Diagonal of the square = √2 × a

Where,

a = side of the square

Calculation:

The area of the square = 289 $$cm^2$$​​

=> a²= 289

=> a = 17 cm

Diagonal of the square = √2 × a

=> √2 × 17

=> 17√2 cm