# Math Dictionary f

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F

Face of a polyhedron Any one of the polygons that bound a polyhedron.

Factor : Factors are the numbers you multiply together to get another number.

Factorial : The result of multiplying a series of descending natural numbers, such as 4, 3, 2, 1.The symbol is "!"

Factoring : Finding what to multiply to get an expression. (Called Factorizing in British English.)

Fahrenheit : Fahrenheit is a temperature scale.It is used to tell how hot or cold something is.It is often written as ° F.

Fibonacci Sequence : The sequence of numbers: 0,1,1,2,3,5,8,13,21,...
Each number equals the sum of the two numbers before it.

Finite number : A definite number.

Fixed point A point that is its own image under a transformation of the plane.

FOIL method : A handy way to remember how to multiply two binomials.It is the sum of:
multiplying the
First terms, multiplying the Outside terms, multiplying the Inside terms, and multiplying the Last terms

Foot of an altitude The point of intersection of an altitude and the line or plane to which it is perpendicular.

Fortnight : A time period of 14 days (2 weeks).

Frequency : How often something happens during a period of time.

Fraction : It is a part of a whole.

Frequency Distribution : A table that lists a set of scores and their frequency (how many times each one occurs.

Frequency Histogram : A graph that uses vertical columns to show frequencies (how many times each score occurs).There should not be any gaps between the bars.

Frequency Polygon : A graph made by joining the middle-top points of the columns of a frequency histogram.

Frequently : Occurs or done often.

Function A rule that assigns to each number x in the function's domain a unique number f(x) .

Math dictionary f

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