Respuesta :

senalvidun

Answer:

length of each side=√81

=9 cm

dest07martinez45

Answer:

9cm

Step-by-step explanation:

a square has 4 equal sides, so to find out the area you do width x height

the area is 81cm², which means that the side length is 9cm as 9 x 9 = 81

hope this helps :)