If a square has a side length of $a$ units, then its perimeter is equal to:

4 a

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4 + a

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a^{4}

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2 a

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Solution

The correct option is A $4 a$
The perimeter of a shape is defined as the total distance around the shape.

Square is a shape with four equal sides and four right (90°) angles.
$∴$ The perimeter of the square $= a + a + a + a$
$= 4 a$
Hence, option (a.) is the correct choice.

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