How it works
Area = side × sideperimeter = 4 × side
- side
- the length of one edge
- Area
- the space inside, in square units
- perimeter
- the distance around, 4 sides
To go the other way, from an area back to the side, take the square root: a 25-square-unit area comes from a side of 5.
Frequently asked questions
What is the area of a square with side 4?
16 square units, from 4 × 4.
How do I find the side from the area?
Take the square root of the area. An area of 36 means a side of 6.
What is the perimeter of a square?
Four times one side, since all four sides are equal.
Is a square a rectangle?
Yes, a square is a rectangle with all sides equal, so length × width still applies.