Respuesta :

xXcOINXx1

Answer:

s = 21 cm

Step-by-step explanation:

Square is s x s = area

So you just take the square root button of the calculator to find that 21 x 21 is 441.

Answer:

21

Step-by-step explanation:

Area of Square formula: side x side

s^2=441

square root both sides:

s=√441=21

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