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Take as an example a 5 x 5 square. Perimeter is 20. Double each side: 10 x 10, the new perimeter = 40, so the answer is B, multiplied by 2.
A square root of a number is a lesser number that when multiplied by it's self equals the larger number. The square root of 16 is 4. 4*4=16
√4 × 16 = ±2 × 16 = ±32 (though the √ symbol normally means the positive square root). √(4 × 16) = √64 = ±8
The two numbers that multiply to 16 are 4 and 4. This is because 4 multiplied by 4 equals 16. In mathematical terms, we can say that 4 times 4 is equal to 16.
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