__F__

**Face
**(of prism) Any one of the flat sides of a solid

**Face
**Any surface that forms a side or base of a prism.

**Faces
of a polyhedron ** The parts
of planes that make up the sides and bases of a polyhedron.

**Factor
**Any of two or more whole numbers that are multiplied to form a product.

**Factorial**
The expression *n*! is the product of
all counting numbers beginning with *n*
and counting backwards to 1.

**Factoring
a polynomial ** Rewriting a
polynomial as a product of two or more polynomials of lesser degree.

**Factoring
**Writing a number as the product of two or more factors

**Fahrenheit
**A temperature scale used on thermometers, on which the freezing point of
water is 32°
and the

boiling
is 212°

**Field**
The elements within each record of a computer data base file.

**File**
A collection of data within a computer data base about a particular subject.

**Finite
set **A set in which we can count the number of elements

**Formula
**A statement of a mathematical relationship

**Fraction
**A number written in the form *a/b*
where a is an element of the set of {0,
1, 2, 3,…}, and b is an element

of
the set of {1, 2, 3,…}

**Frequency
** The number of times that one item appears in a set of
data.

**Frequency
distribution ** A table that
pairs each item in a set of data with its frequency.

**Frequency
polygon ** A line graph of
frequencies, connected to the horizontal axis at each end to form a polygon.

**Function
** A set of ordered pairs in which no two different ordered
pairs have the same x-coordinate.

**Fundamental
Counting Principle** If there are *m*
ways of selecting an item from set *A*
and *n* ways of selecting an

item
from set *B*, then there are *m*
x *n* ways of selecting an item from set
*A* and an item from set *B.*

**Fundamental
theorem of arithmetic **Every composite number can be expressed as the
indicated product of prime

factors
in one and only one way, except for the order of the factors