The following formulas hold for squares:

Area = side * side

perimeter = side * 4

diagonal = square root of (side^2*side^2) (due to Pythagoras)

## Squares

## What is a square?

This is a square. A square is a quadrangle having four sides of the same length and perpendicular to each other. This means, a square is a rectangle and a rhomb at the same time.In a square, these formulas hold: The area equals a*a.

The diagonal has the length a*(square root of 2).

For further information move to mouse over one of the words below and the corresponding part of the square will be marked.

side a

perimeter

diagonal

area