Respuesta :

Answer:

15cm

Step-by-step explanation:

a=l*w

45*5=225

area of a square is a=l^2

225=l^2

15=l

Answer:

15 cm.

Step-by-step explanation:

The area  of the rectangle = 45 * 5

= 225 cm^2.

So the length of the side of the square = √225

= 15.

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