P
Parallel lines Lines in the same plane that do not intersect.
Parallel
planes Two or more planes
that will never intersect
Parallelogram A
quadrilateral with both pairs of
opposite sides parallel.
Percent A ratio
of a number to 100, shown by the symbol %.
Percent of change The
amount of change divided by the original amount.
Percentage
The
number that results from taking a percent of another number.
Perfect
square A number whose
square root is an integer.
Perimeter
The distance around a
plane figure.
Permutation
An arrangement of a group of things in a particular order.
Perpendicular
bisector The line
perpendicular to a line segment which divides the line segment into two
congruent segments
Perpendicular
lines Two lines that
intersect to form four right angles.
Pi (o)
The ratio of the circumference of a circle to its diameter
Pictograph
A picture graph
Place
value The value of the
position of a digit in a numeral
Plane
A flat surface extending
infinitely in all directions.
Plane
figure A geometric figure
all of whose points are in one plane
Point
The simplest figure in geometry, representing an exact
location. A point has no dimensions or
size.
It
has only a position or location. The
idea of a point is represented by a dot and is usually named by a capital letter
Polygon
A closed plane figure
made up of line segments.
Polyhedron
A three-dimensional
figure formed of polygonal parts of planes.
Polynomial
A sum of terms involving
nonnegative integer powers of a variable.
Power
The product of equal factors
Precision
The smallest unit of measure used when measuring an object
Prime
factorization Factoring a composite number into prime numbers
Prime
number A whole number greater than I that has only two whole number factors,
itself and .
Principal
An amount of money on which interest is paid.
Prism
A polyhedron that has two
parallel, congruent faces called bases. The
other faces are parallelograms.
Probability
The ratio of the number of
outcomes favoring an event to the total number of possible outcomes.
Product
The answer to a multiplication problem
Proper
fraction A positive fraction whose numerator is less than its denominator,
or the opposite of such a fraction.
Property
of one for division For each number, the quotient of the number divided by
one is the number.
Or,
for each number
Property
of one for multiplication For each number, the product of the number and one
is the number.
Or,
for each number
Property
of zero for addition For each number, the sum of the number and zero is the
number. Or,
for
each number
Property
of zero for multiplication For each number, the product of the number and
zero is zero. Or, f
or
each number
Proportion
An equation stating that
two ratios are equal.
Protractor
A device used to measure
angles.
Pyramid
A polyhedron that has a
polygonal base and three or more triangular faces.