In geometry, a quadrilateral (four-sided) plane figure with all sides equal and each angle a right angle. Its diagonals bisect each other at right angles. The area A of a square is the length l of one side multiplied by itself (A = l × l).
Also, any quantity multiplied by itself is termed a square, represented by an exponent of power 2; for example, 4 × 4 = 42 = 16 and 6.8 × 6.8 = 6.82 = 46.24.
An algebraic term is squared by doubling its exponent and squaring its coefficient if it has one; for example, (x2)2 = x4 and (6y3)2 = 36y6. A number that has a whole number as its square root is known as a perfect square; for example, 25, 144, and 54,756 are perfect squares (with roots of 5, 12, and 234, respectively).
Calculating powers and square roots
Angles in a polygon
Pythagoras' theorem: working out angles
BEATCALC: Beat the Calculator
squares, cubes, square roots, and cube roots
[13 century] Etymologically a square is a ‘four’ - sided figure. The word comes via Old French esquare or esqire (squire was the Middle...
/skweə/ ; noun 1. a shape with four equal sides and four right angles Graph paper is drawn with a series of small squares. 2. ...
1. A simple quadrilateral with four equal sides and all four angles right angles. 2. A number or expression obtained by...