Given a square where the length of each side is 2cm. Find the perimeter of this square.
The picture below shows the square. The length of each side is 2cm.
To calculate the perimeter, we can start with the formula for the perimeter of a square:
Since the length of each side is given as 2cm, we can substitute L with 2. After doing so, we can calculate for P:
Now, the calculated number, 8 only has meaning if we include the unit for it. Since the length is given in cm, the unit the perimeter will also be in cm. Hence:
Clearly, the answer is D.
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