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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).
© Research Machines plc 2008. All rights reserved. Helicon Publishing is a division of Research Machines plc.
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addition
arc
chord (geometry)
circle
circle theorem
circumference
common factor
cone (geometry)
congruent
cosine
cross-section
cube (geometry)
cube (mathematics)
cube root
cuboid
cylinder (geometry)
division (mathematics)
elevation, angle of
exponent
factor (number)
geometry
hexagon
index notation
integer
irrational number
multiple
multiplication
negative number
number (mathematics)
number line
octagon
parallelogram
pentagon
pi
place value
polygon
power (mathematics)
prime factor
prime number
prism (mathematics)
pyramid (geometry)
Pythagoras' theorem
quadrant
quadrilateral
radius (mathematics)
reciprocal
rectangle
rhombus
root (inverse of power)
rounding
sector (mathematics)
similar
similar triangles
sine
sphere
square
square root
standard form
subtraction
surd
tangent (circle)
tangent (trigonometry)
tetrahedron
three-dimensional
trapezium
triangle (geometry)
trigonometry
two-dimensional
arc
chord (geometry)
circle
circle theorem
circumference
common factor
cone (geometry)
congruent
cosine
cross-section
cube (geometry)
cube (mathematics)
cube root
cuboid
cylinder (geometry)
division (mathematics)
elevation, angle of
exponent
factor (number)
geometry
hexagon
index notation
integer
irrational number
multiple
multiplication
negative number
number (mathematics)
number line
octagon
parallelogram
pentagon
pi
place value
polygon
power (mathematics)
prime factor
prime number
prism (mathematics)
pyramid (geometry)
Pythagoras' theorem
quadrant
quadrilateral
radius (mathematics)
reciprocal
rectangle
rhombus
root (inverse of power)
rounding
sector (mathematics)
similar
similar triangles
sine
sphere
square
square root
standard form
subtraction
surd
tangent (circle)
tangent (trigonometry)
tetrahedron
three-dimensional
trapezium
triangle (geometry)
trigonometry
two-dimensional
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