Answer:
15 units
Explanation:
Side length of the square will be square root of 225 or 15 units. Hope this helps!
15
The area of a square is given by
A = s^2 where s is the side length
225 = s^2
Take the square root of each side
sqrt(225) = sqrt(s^2)
15 = s
The side length is 15
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