Question

The area of a square board is 81cm².what is it's perimeter

Answer 1

Answer:

The perimeter of square is 36 cm.

Explaination -

Area of square= 81cm²

Area of square=s×s

81cm²= 2s

81/2=s

9 = s

Or

s=9cm

→Side of square is 9 cm.

Perimeter of square= 4s

perimeter of square=4(9)

Perimeter of square=36cm

→Perimeter of square is 36 cm..

Answer 2

Explanation:

Area of square board = 81cm^2

Side of square board = √81 = 9cm

Perimeter of square board = 9 × 4 = 36cm

Perimeter of square = 4 × side