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sample
Refers to a representative portion of the
population from which information is gathered.
sample space
For an experiment, the sample space includes
all the possible outcomes.
scale drawing
A drawing that is a reduction or enlargement
of the original.
scale factor
The ratio of a distance measured on a scale
drawing to the corresponding distance measured
on the actual object.
scalene triangle
A triangle with three unequal sides.
scattergram
A graph with points plotted on a coordinate
plane.
scientific notation
A method for writing extremely large or small
numbers compactly in which the number is shown
as the product of two factors.
secant of circle
A line that intersects a circle in two points.
secondary data
Data obtained indirectly from sources such
as a book or computer database.
sector
An area between an arc and two radiuses of
a circle. Sometimes referred to as a wedge.
segment
A piece of a line with two endpoints.
sequence
A set of numbers, called terms, arranged in
some particular order.
set
A well-defined group of objects.
similar
Two polygons are similar if their corresponding
sides are proportional.
simplest form (lowest terms)
A fraction is in simplest form if both its
numerator and denominator are whole numbers
and their only common factor is 1.
simplified fraction
A fraction in simplest form.
sine
In a right triangle, the ratio of the length
of the side opposite the angle to the length
of the hypotenuse.
simplifying
Reducing to lowest terms.
skew lines
Lines that are not in the same plane and that
do not intersect.
slope
The steepness of a line expressed as a ratio,
using any two points on the line.
slope-intercept
An equation of the form y=mx+b,
where m is the slope and
b is the y-intercept.
solution
The value of a variable that makes an equation
true.
sphere
A three-dimensional figure with all points
in space a fixed distance from a given point,
called the center.
spreadsheet
A computer generated arrangement of data in
rows and columns.
square
A quadrilateral with four equal sides and
four 90 degree angles.
square root
The square root of x is the number that, when
multiplied by itself, gives the number x.
standard deviation
A statistic that measures the dispersion of
a sample.
standard notation
Decimal notation.
statistics
The science of collecting, organizing, and
analyzing data.
stem-and-leaf plot
In statistics, a way of recording, organizing
and displaying numerical data so that the
original data remains intact.
straight angle
An angle that measures 180 degrees.
subset
A set that forms one part of a larger set.
subtraction
The process of finding the difference between
two numbers.
sum
The result of adding numbers.
superset
A set that consists of a collection of smaller
subsets.
supplementary angles
Two angles are supplementary if their sum
is 180 degrees.
surface area
For a three-dimensional figure, the sum of
the areas of all the faces.
symmetry
A correspondence of parts.
system of equations
A collection of two or more equations with
a same set of unknowns.
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