Page 96 - Mathematics Class - X

GLOSSARY

A Composite: are made up of parts, each of which is

Addend: is a quantity added to another in forming a itself a whole.
sum. Composite numbers: are non-zero whole numbers
Acute angle: is an angle whose measure is greater than with more than two divisors.
0° and less than 90°. Concentric circles: are circles which have the same
Adjacent angles: are two angles which have a common centre but different radii.
ray between them. Congruent: two figures are said to be congruent if

Altitude of a triangle: is a line segment drawn they have the same size and shape.
perpendicular from a vertex to the side opposite it. Constant: is a number independent of any variable.
Angle bisector: is a line segment which bisects an Cyclic Quadrilateral: is a quadrilateral whose all four
angle into two parts. vertices lie on a circle.
Arc: is a part of the circumference of a circle. D
Area: is the extent of a surface as measured by the Denominator: is a part of a fraction, written below the
number of unit squares it contains. numerator.

B Diagonal: is the line joining two non-adjacent vertices
Binomial: is an algebraic expression consisting of two of a polygon.
Diameter: is a chord that passes through the centre of
terms. the circle and divides the circle into two equal parts.
Bisector: is a line which divides a line or an angle into Diamond: is a special rhombus in which one of its
two equal parts.
diagonal is equal to its sides.
C Difference: is the number that is obtained from

Centroid: is the point of concurrence of the medians subtracting one quantity from another of the same kind.
of a triangle. Dividend: is a number to be divided by another number
Chord: is a line segment that connects two points on (Divisor).
the circumference of a circle. Divisor: is a number by which another number
Circumcentre: is the point of concurrence of the (Dividend) is divided.
perpendicular bisectors of a triangle. E
Circumference: is the perimeter of a circle. Equation: is a statement of equality between two
Collinear: More than two points in the same straight mathematical expressions.
line are said to be collinear. Equiangular: if all the angles of a polygon are equal,
Cube: is a body of six faces which are square in shape. it is said to be equiangular.
Cuboid: is a body of six faces which are a combination Equilateral: if all the sides of a polygon are equal, it is
of squares and rectangles. said to be equilateral.
Corresponding angles: is a pair of angles whose one Equivalent fractions: are any two fractions that
arm is a transversal, and the other directed in the same represent the same number.
direction. Even Number: a number that is divisible by two.

Complementary angles: is a pair of angles whose Exponent: a notation in which a non-zero whole
sum is a right angle. number is used to indicate the number of times the

base number is used as a factor.
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