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To find the diagonal dimension, you must find the length of the hypotenuse
The formula to find the hypotenuse is a2 + b2 = c2. Since we know that both the legs are twenty feet long, then we can fill in the formula.
202 + 202 = c2
400 + 400 = c2
800 = c2
c = √800
c ≈ 28.28
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