Page 98 - Mathematics Class - X

Polygon: is a closed, many-sided figure in which the Right angle: is an angle whose measure is 90°.
line segments do not cross. S
Polyhedron: is a three-dimensional figure formed by
the union of polygons; the polygons juxtapose only at Secant of a circle: is the line that passes through the
the edges. circle and intersects the circle at two distinct points.
Polynomial: is an algebraic expression having two or Sector: is an area enclosed by an arc and two radii
more terms. joining the end points of the arc to the centre.

Power: is an exponent that denotes the number of Square of a number: is the product of a number
times a number has to be multiplied. multiplied by it.

Prime number: is a whole number that is greater than Square root: is a factor of a number that when squared
one and has no factors other than one and itself. gives the number.

Prism: is a three-dimensional figure having two parallel Straight angle: is an angle whose measure is 180°.
polygonal faces, the other faces being parallelograms. Subset: is a set, each of whose elements is an element
Product: is a number that is obtained as a result of of another set.
multiplying two factors. Subtrahend: In subtraction, the smaller number that is
to be taken away or subtracted.
Proper fraction: is a fraction, whose numerator is Sum: The number that is obtained as a result of
smaller than the denominator. combining the addends in an addition problem.
Proportion: is a statement that denotes the equality of Supplementary angles: is a pair of angles whose
two ratios. sum is 180°.
Pyramid: is a three-dimensional figure of which the
base is a polygon and the other faces are triangles with T
a common vertex. Transversal: is a line which intersects two or more
lines.
Q Transposition: is a process in which a term is dropped

Quadrant: is a sector whose angle is right angle. from one side of an equation and is written on the other
Quadratic Equation: is an equation in one variable side with the opposite sign.
for which at least one term involves the square of the Tangent: is a line that is perpendicular to the radius
variable. and just touches the circle at a single point without
intersecting it.
Quotient: is the number resulting from the division of
one number by another. Theorem: The results of a mathematical problem that
have been proved or that must be proved.
R U

Radius: is a segment that connects the centre of the Unlike fraction: is a fraction that has different
circle to any point on the circumference of the circle. denominators.
Ratio: is the fraction that is formed when two quantities
are compared by an indicated division. V
Rational numbers: are a set of numbers that consist of Variable: is a symbol, which takes different numerical
the fractional numbers and their inverses. values in different expressions.

Ray: is a line that includes one end point and extends Vertices: are end points of the line segments in a
infinitely in one direction. polygon.
Real numbers: are the unions of rational and irrational W
numbers. Whole numbers: The counting numbers and zero
Remainder: is the number that results when the taken together.
division of whole numbers is not exact.

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