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What's a Perfect Square?
Definition: Perfect Square
Summary
- 16 can be broken down into 4•4=42, so 16 is a perfect square
- Keep in mind that a perfect square has to be the square of an integer
- 4, 9, 16, 25, 36, 49, 64, 81, and 100 are perfect squares

Notes
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- 4 is an integer, and 42 is 4•4=16
- So by our definition, 16 is a perfect square
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- 4 • 4 = 42
- 16 is a perfect square in part because 4 is an integer
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- After all, we can just count up from one, and keep squaring integers to get more perfect squares
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