a number that can be factored into a number times itself
a number that has an whole number square root
positive rational number whose principal square root is a rational number
A number that is the square of a positive integer. The numbers 4, 9, and 16 are perfect squares.
integer that is the square of another integer. Thus, is a perfect square because .
A whole number resulting from multiplying an integer by itself; a is a perfect square if a = n*n and n is an integer (e.g. 16=4*4 and 121=(-11)*(-11)).