The square root of a perfect square is a whole number.
Example sqrt(36) = 6 so 36 is a perfect square
Example sqrt(25) = 5 so 25 is a perfect square
Example sqrt(8)= 2.828 which is not whole so 8 is not a perfect square
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Perfect square roots are square roots that have a whole number that can go into it perfectly. Nonperfect square roots are square roots that have decimal numbers going into it. Example: Perfect Square Root: 144- Square Root: 12 Nonperfect Square Root: 24- Square Root: About 4.89
Find the perfect squares that your number lies between. Your square root will lie between their square roots. Whichever it is closer to will indicate the size of the decimal.
Perfect square roots are the counting numbers {1, 2, 3, ...} The squares of the perfect square roots are the perfect squares, namely 1² = 1, 2² = 4, 3² = 9, etc.
16 and 25 42 and 52
a perfect square