S
Sampling
A method used to estimate probability by selecting a
part of a larger group.
Scalene
triangle A triangle with no two sides congruent.
Scientific
notation A method of
expressing a number as the product of a power of
10 and a number between
1
and 10.
Sector
(of circle) The region of a circle enclosed by two radii and the arc of the
circle cut off by the radii
Segment
See line
segment.
Semicircle
Half of a circle.
Set
A collection of distinct objects (2) Sides
(of angle) The rays which form the angle
Sides
of a figure The rays that form
an angle or the segments that form a polygon.
Sides
of an equation The
mathematical expressions to the right and to the left of the equals sign.
Sieve
of Erastosthenes A method used to locate prime numbers less than a given
number
Similar
figures Figures that have
the same shape but not necessarily the same size.
Simple
closed curve A closed curve whose representation meets itself only once, and
that is at the beginning point
Simple
form A mixed number is in simple form if its fractional part
is expressed in lowest terms.
Simplify
an expression To replace
an expression with its simplest name.
Sine
of an angle If LA
is an acute angle of a right triangle, the sine of LA sin A is the ratio of the length of the side opposite LA to the
length of the hypotenuse.
Slope
of a line The steepness
of a line; that is, of the change in the y-coordinate to the change in the
x-coordinate when moving from one point on a line to another point.
Solid
An enclosed region of space bounded by planes.
Solution
A value of a variable that makes an equation or
inequality a true sentence.
Solving
a right triangle The
process of finding the measures of the sides and angles of a right triangle.
Sphere
A figure in space made up of all points equidistant from a given point.
Square
A rectangle with all four sides congruent.
Square
root of a number One of
the two equal factors of the number.
Standard
form A way of writing
polynomials so that like terms are combined wherever possible, and the combined
terms are arranged so that powers of the variable decrease from left to right.
Statistics
The science of collecting, presenting, and interpreting data
Statistical
measures Measures
including the range, mean, median, and mode used to analyze numerical data.
Stem-and-leaf
plot A data display that
lists the last digits "leaves" of the data values to the right of the
earlier digits "stems".
Straight
angle An angle with a measure of 1800
Supplementary
angles Two angles whose
measures have a sum of 180°.
Surface
area The total area of a solid.
Symmetric
, A figure is
symmetric with respect to a line if it can be folded on that line so that every
point on one side
System
of equations A
set of two or more equations in the same variables.
System
of notation The method of writing the numerals, or names of numbers
System
of numeration Each set of basic symbols and the rules for combining them to
name numbers