## Sketch

## Perimeter of a square

**Formula**: a * 4 = U (circumference)

**Example calculation:** 5cm * 4 = 20cm

## Area of a square

**Formula**: a * a = A (area)

Example**calculation**: 5cm * 5cm = ^{25cm2}

The calculation of a square can refer to different aspects, including the calculation of the area, the perimeter or the diagonals. Here are the basic formulas for these calculations:

**The area of a square**: the area of a square is calculated by squaring the length of a side. So if the length of a side is a, then the area is A = a².**The per**imeter of a square: The perimeter of a square is calculated by multiplying the length of a side by four. So if the length of a side is a, then the perimeter is P = 4a.**The diagonal** of a square: The diagonal of a square is calculated by multiplying the length of one side by the square root of two. So if the length of a side is a, then the length of the diagonal is d = a√2.

These formulas apply regardless of the size of the square and can be used to calculate various properties of a square, provided the length of a side is known.