Page 101 - Mathematics Class - IX

Exponent: a notation in which a non-zero whole number K
is used to indicate the number of times the base number is
used as a factor. Kite: is a convex quadrilateral, which has two pairs of equal
Expression: is a polynomial. length sides adjacent to each other, and one pair of equal
obtuse angles opposite to each other.
F L

Factors: are numbers that when multiplied together give LCM: Least Common Multiple is the smallest number
the original number. other than zero that is a multiple of several numbers.
Factorization: is the method used to determine the factors Like fractions: are fractions that have the same denominator.
of a whole number.
Formula: is a way of expressing a rule by using algebraic Line segment: is the shortest distance between two points.
symbols and operations. Linear equation: is an algebraic equation that represents

Fraction: is a way of showing the relationship between two lines, in one variable.
numbers – the number of parts and the number of whole. M

Face Value: is the value of a digit in a numeral.
Mean: is an average number that is obtained by adding all
G values and then divided by the number of addends.
Median: is a line segment with the vertex of a triangle as
Geometry: is a mathematical study of the properties of and
relation between points, lines, angles, surfaces and solids. one end point and the midpoint of the opposite side of the
triangle as the other end point.
H Minuend: is a number from which another number
(subtrahend) is to be subtracted.
HCF: Highest Common Factor is an exact divisor of two or
more numbers. Monomial: is an algebraic expression consisting of one
term only.
Hypotenuse: is the side of a triangle opposite to the right Multiplicand: is a quantity which is to be multiplied by
angle.
another (the multiplier).
I N

Identity: is an equality which is true for all values of
variable. Natural numbers: are the counting numbers.
Improper fraction: is a fraction in which the numerator is Numerator: is the part of fraction written above the
equal to or greater than the denominator. denominator and separated from it by a horizontal line.
Incentre: is the point of concurrence of the angle bisectors O
of a triangle.
Integers: are the whole numbers together with negative of Obtuse angle: is an angle whose measure is greater than
natural numbers. 90° and less than 180°.
Inverse: is the reciprocal or opposite in effect. Odd number: is a number that is not a multiple of two.
Intercept: is a part of a segment contained between two Ortho-centre: is the point of concurrence of the altitudes
points of intersection. of a triangle.
Irrational number: is a number which cannot be expressed
as an integer or as a ratio with a finite number of figures. P

J Parallel lines: are lines that have the same direction, are
equidistant from each other at all points and which do not
Juxtapose: is keeping two shapes side by side, so as to form intersect.
a composite figure. Per cent: is a Latin word meaning “per hundred”.
Perimeter: is the distance around a geometric figure.

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