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
N
negative integer exponent
negative rational number
net
 a plane figure obtained by opening and flattening
a 3D object.
O
obtuse angle
 an angle whose measure is between 90^{o}
and 180^{o}.
obtuse triangle
 a triangle with one obtuse angle.
odds
 the ratio of the probability that an
event will occur compared with the probability of its not
occurring.
open expression
opposites (additive inverses)
 two numbers whose sum is 0.
ordered
pair
 a pair of numbers for which the order is
important. E.g. a pair of numbers that gives the location of a
point in a plane such as (3,1). The order of the numbers in the
pair is important because the point (1,3) is not the same as the
point (3,1).
ordinate
 the second element in a
coordinate pair. When graphed in the coordinate plane, it
is the distance from the xaxis. Frequently called the y coordinate.
outcome
Questions or comments about the glossary can
be directed to TheCentralizer@MathCentral.uregina.ca
or see About Us
page for more information.
