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A '''square''' is a [[polygon]] with four sides of equal length and four [[right angle]]s.
A '''square''' is a [[polygon]] with four sides of equal length and four [[right angle]]s.
[[Image:square.gif]]
[[Image:square.gif]]
Because it has two pairs of parallel sides, it is a parallelogram; because all of those four sides are equal in length, it is a thombus; because it is a parallelogram with four right angles, it is a rectangle.
In [[algebra]], to square means to multiply a number by itself. For example, the square of 3 is 9 (3·3 = 3<sup>2</sup>). (See also [[exponent]])
In [[algebra]], to square means to multiply a number by itself. For example, the square of 3 is 9 (3·3 = 3<sup>2</sup>). (See also [[exponent]])