Dictionary for Basic and Intermediate Algebra
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A pair of lines with same slope that will never meet.


A Parallelogram is a quadrilateral with two pairs of parallel sides. 


Round brackets appear as a pair.


A ratio expressed with a denominator of 100.

Perfect square

An integer that is the square of another integer, such as 1, 4, 9. ...etc. For example, 49 is a perfect square number, since 49 = 72 .


Two lines intersect at a right angle are perpendicular to each other. The slope of one line is negative reciprocal of the other.


The ratio of the circumference of any circle to its own diameter, denoted by .  It is a transcendental number and approximately equal to 3.14. 

Place value

The place value of a digit of a number in a counting system denotes the location of that digit and is represented by a power of the base of that counting system. For example, units, tens, hundreds, etc. in the decimal system.


Connect points on a graph relative to a coordinate system.


Plus is an addition operation. 


A closed plane figure bounded by three or more straight line segments that terminate in pairs at the same number of vertices, and do not intersect other than at their vertices.


An expression containing two or more terms, such as wpe16.jpg (1161 bytes).

Positive value

Having a value greater than zero.

Prime number

A natural number having no factors other than 1 and itself, such as 3,5,7,11 etc.


The result of multiplication of two or more numbers.

Property of real numbers

For any real numbers a,b, & c the following properties are valid.

i) For addiction:

Commutative: a + b = b + a

Associative Law: (a + b) + c = a + (b +c)

Additive Identity: a + 0 = a

Aditive Inverse (opposite): a + (-a) = 0

ii) For multiplication:

Commutative Law: ab = ba

Associative Law: (ab)c=a(bc)

Multiplicative Identity: a1= 1 a = a

Mutiplicative Inverse (reciprocal): a (1/a) = (1/a) a = 1




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