A square is a rectangle with all four sides of equal length, as shown below.

Square of a number

The square of a number (n2) is the result of multiplying that number by itself.
62 may be expressed as 6 × 6 and is equal to 36. Some ways of reading 62 are "the square root of 6," "six squared," and "6 to the power of 2." The image below is a model of 62.

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A square is also a rhombus, since it is a parallelogram in which all sides are congruent! While all squares are rhombuses, not all rhombuses are squares. This is also true regarding squares and rectangles.

See also square centimeter, square unit.