Yes, nine is a perfect squarebecause 9 = 3*3
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Because 9*9 = 81 which is a square number or a perfect square.
Because 9 is a perfect square - which means that its square root is an integer. 3 is not a perfect square.
A perfect square is a number whose square root is a whole number, such as 1, 4, 9, 16, 25, etc.
A whole number that can be made by multiplying an integer by itself is a perfect square, or square number. An example is 81, which is a perfect square made by 9 x 9.
A perfect square.