Step 1

The picture below shows the square with the sides of 5cm.

Step 2

To calculate the area, we can start with the formula for the area of a square:

Step 3

Since the length of each side is given as 5cm, we can substitute r with 5. After doing so, we can calculate for A, as shown below:

Step 4

Now, the calculated number 25 only has a meaning if we include the unit for it. Since the given length is in cm, the unit for area will be cm². Hence:

A = 25 cm²

Step 5

Clearly, the answer is A.

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