Square (geometry) - MSN Encarta

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Square (geometry) - Wikipedia, the free encyclopedia
In Euclidean geometry, a square is a regular polygon with four equal sides. A square with vertices ABCD would be denoted ABCD.
Square (geometry) - MSN Encarta
Square geometry, two-dimensional figure with four straight sides, whose four interior angles are right angles 90°, and whose four sides are of...
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Square (geometry), two-dimensional figure with four straight sides, whose four interior angles are right angles (90°), and whose four sides are of equal length.

If the sides of a square have length s, the perimeter of the square is simply four times the length of a side, represented algebraically by the formula P = 4s. The area of a square is determined by multiplying the length of a side by itself: A = s².

A square is a special case of several broader types of four-sided figures: quadrilaterals, parallelograms, rhombuses, and rectangles. All squares are rectangles, for example, but not all rectangles are squares because many rectangles have pairs of sides that are not the same length.

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