Question

Find the length of the side of a square in centimetre whose area is 81 sq mm

Answer 1

area of square= (side) square

81=(side) square


side=√81= 9mm=0.9cm(((1 cm= 10mm)))

hope it helps

Answer 2

Given: The area of the square is 81 mm^2.

To find: The side of the square in centimeters.

Answer:

Area of a square  = Side x Side = Side^2.

Therefore, the side/length of a square = √Side^2.

Side of the square = √81 = 9 mm.

Now, let us convert 9 mm to centimeters. To do so, divide the values by 10.

9 mm = 0.9 cm

Therefore, the side of the square having an area of 81 mm^ is 0.9 cm.

Hope it helps :)