Respuesta :

NEOVISION

Answer:

Step-by-step explanation:

well, if the area is 100cm^2

then its side must be 10cm

why?, because the area of  square is s*s

so if s=10

then s*s = 10*10 which is 100

so, how many sides does square have? 4

so 4 times 10 = 40

and done!