The square root of two, while an irrational number, is indeed a square. It is the same as asking if the square root of 4 (2 X 2) a square (it is). By the way, the square root of two is approximately 1.41421356. Hope that helped!
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Yes as for example if the rectangle has sides of square root 8 and square root 2 which are two irrational numbers but when multiplied it gives an area of 4 square units which is a rational number.
Diagonal of a rectangle or square = square root of ( length2 + width2 )
The square root of 2 plus the square root of 2 is equal to twice the square root of 2, therefore the correct answer is: 2(√2) or √8
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