Abscissa
The first component
of a point in the Cartesian Coordinate Plane.
For example, the abscissa of the point P(2, 1) is 2.
Absolute
Value
The absolute
value of a real number x, denoted x, is the distance from x to
0 (on a real number line). The absolute value of any number
can not be negative. For example .
To solve
equations with absolute
value use the equivalent definition
Acute
Angle
An angle between
0^{o} and 90^{o}
Add
Perform the
addition of two or more expressions. For example, .
To add fractions,
you have to give them a common denominator and then add their numerators,
for example,
.
Addend
Any of a sequence
of numbers that are to be added. For example in 3 + 4,
the addends are 3, and 4.
Addition
Mathematical
operation performed on two or more expressions to give a result
which is their sum. For example, polynomials are added by combining
like terms.
Additive
Identity
Is the number
added to any given number x will still get you x.
In symbols, x + 0 = x = 0 + x, where 0 is the additive identity.
Additive
Inverse
The additive
inverse of an element x is the opposite of x, e.g.,
the element that added to x give 0; symbolically x
. For example .
Algebra
The branch of
elementary mathematics that generalizes arithmetic by using letters
to denote arbitrary numbers. The name algebra came from the Arabic
aljabr w'almuqabala meaning "restoration and reduction",
which first occurred in the works of alKhwarizmi (c780850
A.D.).
Algebraic
Expression
Any finite combination
of numbers, letters and arithmetic operations, constructed in consonance
with the rules of formation.
Algorithm
A mechanical
procedure for solving a problem in a finite number of steps. For
example, the method to find the least common multiple of two numbers.
The name derived from the Arab mathematician alKhwarizmi.
Area
The measure
of (a limited region on) a surface. For example: The area
of a triangle with base 4 cm and height 5 cm is .
For formula, click here.
Arithmetic
The branch of
mathematics concerned with numerical calculations, such as addition,
subtraction, multiplication, division and the extraction of roots.
Associative
Describing the
property of a binary operation that the result does not depends
on how the elements are grouped. The associative law for addition
is a+(b+c)=(a+b)+c and for multiplication is
a(bc)=(ab)c. Subtraction and division are not associative,
for example 7(52)=4 whereas (75)2=0.
Average
Average is the
mean value of a group of numbers. For example: The average
of 1, 4, 7, and 8 is 5, since .
Axis
In a Cartesian
Coordinate System, either of the lines used to located a point in
terms of its perpendicular distance from them. The number of
axes is called the dimension of the space. For example, there
are the xaxis and the yaxis in the Cartesian coordinate
plane, which has a dimension two.
