First of all, what we need to know are the formulas. To calculate the area, we use the following formula: Square area = side x side. Therefore, since we know that the sides of a square measure the same if the side is 2cm, the area is:
Square area = side x side = 2 cm x 2 cm = 4 cm2
Example of square area (50 cm side):
If the side measures 50cm.
Square area = side x side = 50 cm x 50 cm = 2500 cm2
Example of square area (30 cm side):
The area of this square would be = side x side = 30 cm x 30 cm = 900 cm2
Very important. The unit of measure must be squared. If it is centimeters, meters, decimeters.
How is the perimeter of a square calculated?
The perimeter is the sum of all its sides. Therefore, in a square, it is the sum of its four sides.
Example of square perimeter (2 cm side):
In a first example, if the side measures 2 cm. The perimeter is:
Perimeter = 2cm +2cm +2cm +2 cm = 8cm
Example of square perimeter (25 cm side):
In a second example, since the side measures 25 cm, the perimeter is:
Perimeter = 25cm + 25cm + 25cm +25cm = 100cm
Example of square perimeter (140 cm side):
The last example, the one with a side of 140 cm:
The perimeter will be = 140 cm + 140 cm + 140 cm + 140 cm = 560 cm
