The area of a square is 81 cm2 . Find the perimeter of the square. Determine the diagonal of the square.
SOMEONE PLEASEEEEEEEEEEEEE SHOW YOUR WORK FOR THE DIAGONAL PART, I KNOW THE DIAGONAL IS 9 TO THE SQUARE ROOT OF 2 BUT MY TEACHER IS ASKING ME TO SHOW MY WORK AND I DONT KNOW WHAT TO DO TO GET 9 TO THE SQUARE ROOT OF 2, I GOT THE ANSWER FROM THE INTERNET, PLEASE SHOW YOUR WORK ON HOW TO GET THE ANSWER 9 TO THE SQUARE ROOT OF 2 FOR THE DETERMINATION OF THE DIAGONAL