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James Dube · Answer 1 · 2017-11-29T21:59:25+0000

the area of a square is : A = a^2, where a is the length of one side

A = a^2
A = 479

479 = a^2....take the square root of both sides, eliminating the ^2
sqrt 479 = a
21.886 rounded to nearest foot is 21...so 21 ft = a (the length of 1 side)

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