Mathematics Glossary
 Middle Years
Maxine Stinka, Saskatchewan Education,
Curriculum and Instruction
Note: The
definitions included here are those that are used in the Saskatchewan
Education document "Mathematics 69: A Curriculum Guide for the
Middle Level".
Various mathematics dictionaries
may have different definitions. These definitions are designed
to be meaningful to middle level mathematics teachers.
Select the first letter of
the term that you wish to look for.
A  B
 C  D
 E  F
 H  I
 J  K
 L  M
 N  O
 P  Q
 R  S
 T  U
 V  W
 X  Y
 Z
T
term
 any expression written as a product or quotient.
e.g. 3xy, 2m^{3}, or 5x^{3}y^{2}z
tessellate
 the repeated use of geometric figures to
completely cover a plane without overlapping.
theoretical probability
 probability that is determined on the basis
of reasoning, not through experimentation. e.g. Since a regular
die has 6 sides, the theoretical probability of tossing a 3 is
1/6.
transformation
 a movement of one geometric shape to another
according to some rule. The common transformations used in middle
level mathematics are translations, rotations,
and reflections.
translation
(slide)
 an exact duplication of a geometric figure
formed by moving each point in the figure the same distance and
in the same direction.
transversal
 a line that intersects 2 or more other lines
in the same plane.
trapezoid
 a quadrilateral with at least one pair of
parallel sides.
tree diagram
 a diagram representing a systematic way
of determining all possible outcomes in a probability experiment.
e.g. if you toss two coins, the possible outcomes are (H,H), (H,T),
(T,H) and (T,T):
trinomial
turn
U
unit price
 the price of a single item or the price
per kilogram or gram.
unlike terms
V
variable
 a symbol, usually a small case letter, used
to represent one or more numbers. e.g. In the expression 2x +
3, the variable is x. The 3 is called a constant because its value
never changes.
vertex
(plural: vertices)
 the point of intersection of two rays that
form an angle, two sides of a polygon
or two edges of a solid.
vertically opposite angles
vulgar fraction
 a rational number expressed as an integer divided by a nonzero integer. For example the rational number two and onefifth can be expressed as the mixed number 2 1/5 or as the vulgar fraction 11/5.
W
whole number
 an number consiting of one or more units,
without fractions.
Questions or comments about the glossary can
be directed to TheCentralizer@MathCentral.uregina.ca
or see About Us
page for more information.
