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>).
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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 rhombus; because it is a parallelogram with four right angles, it is a rectangle.
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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]])