odds against (ODZ uh-GENST) The chances an
unfavorable outcome will occur:. (p. 338)
odds in favor of (ODZ IN FAY-vur UHV) The
chances a favorable outcome will
occur:. (p. 338)
open sentence(OH-puhn SEN-tuhnss) An
algebraic equation that contains one or more
variables. Open sentences are neither true nor
false. (p. 35)
opposite integers (additive inverses) (OP-uh-zit
IN-tuh-jurz [AD-i-tiv IN-vurss-iz]) Integers that
are the same distance from 0 on a number line
but are located on opposite sides of 0. The sum of
a pair of opposite integers is 0. (p. 2)
ordered pairs(OR-durd PAIRZ) Coordinates used
to locate a point on a grid; the first number is the
x-coordinate, and the second number is the y-
coordinate. (p. 22)
order of operations(OR-dur UHV op-uh-RAY-
shuhnz) A set of rules that is used to simplify
mathematical expressions with more than one
operation. (p. 20)
origin(OR-uh-jin) On the coordinate plane, the
point of intersection of thex-axis and they-axis;
the point represented by (0, 0). (p. 22)
orthographic drawings (or-thuh-GRAF-ik
DRAW-ingz) Two-dimensional views of the front,
side, and top of a three-dimensional figure. (p. 305)
outcome (OWT-kuhm) The result of an
experiment. (p. 330)
outliers(OWT-lye-urz) 1. Numbers in a data set
that are much greater or much less than others in
the set. (p. 212) 2. Points that are clearly separate
from a set of data. (p. 223)
output values (OWT-putVAL-yooz) Another
name for range, or y-values. (p. 358)
overestimate (OH-vur-ESS-ti-muht) An estimate
greater than the actual value. (p. 312)
overlapping events (oh-vur-LAP-ing i-VENTS)
Two events that have one or more outcomes in
common. (p. 335)
P
parabola (puh-RAB-uh-luh) A U-shaped curve on
a coordinate plane that can open either up or
down. (p. 367)
parallel lines (PA-ruh-lelLYENZ) Lines that are
in the same plane but do not intersect. (p. 241)
parallelogram (pa-ruh-LEL-uh-gram)A
quadrilateral with two pairs of parallel sides.
Opposite sides and opposite angles are
congruent. (p. 260)
parallel planes (PA-ruh-lelPLAYNZ) Planes that
do not intersect. (p. 241)
percent (pur-SENT) A ratio or comparison of a
quantity to 100. n%. (p. 174)
percentage(pur-SEN-tij) A number that is part of a
whole. rate (r) • base (b) percentage (p). (p. 180)
percent change (pur-SENT CHAYNJ) A ratio
comparing a change in a quantity to an original
amount. percent change.
(p. 188)
percent decrease (pur-SENT DEE-kreess) The
amount of the decrease in a quantity divided by
the original amount. (p. 190)
percent increase (pur-SENT IN-kreess) The
amount of the increase in a quantity divided by
the original amount. (p. 188)
perfect square(PUR-fikt SKWAIR) A number
that is the square of a counting number; for
example, 25 is the perfect square of 5. (p. 276)
perimeter (puh-RIM-uh-tur) The sum of the side
lengths of a polygon. (p. 274)
permutation (pur-myoo-TAY-shuhn) An
arrangement of items or objects in which order
is important. (p. 342)
perpendicular bisector (pur-puhn-DIK-yuh-lur
BYE-sekt-ur) A perpendicular line segment that
bisects another line segment. (p. 248)
perpendicular lines (pur-puhn-DIK-yuh-lur
LYENZ) Lines that intersect at right angles.
(p. 241)
perpendicular planes (pur-puhn-DIK-yuh-lur
PLAYNZ) Planes that intersect at right angles.
(p. 241)
pi (PYE) An irrational number symbolized with
the Greek letter (p. 279); the ratio of the
circumference to the diameter of any circle (p. 286)
plane (PLAYN) A flat, two-dimensional surface
that extends infinitely in all directions. (p. 241)
point (POYNT) An exact location in space. (p. 240)
point symmetry (POYNT SIM-uh-tree) A name
for a special kind of rotational symmetry. The
property of a figure that has a matching image
after being rotated half a turn around its center
point. (p. 291)number of unfavorable outcomes
number of favorable outcomesnumber of favorable outcomes
number of unfavorable outcomes
part
wholen
100amount of change
original amount432 Glossary