Math Dictionary-F deals with words starting with the letter **F**.

Face is a surface bounded by edges of a three dimensional solids.

*Face of a polyhedron*

Face of a polyhedron is any of the two dimensional polygons, that makes its boundary of a polyhedron. Each face is a polygon.

__Factor__

Factor is a number which divides another number exactly. For example 5 is a factor of 25 and 3 is factor of 27.

__Factorial:__

Factorial of a number 'n' is a product of consecutive numbers from 1 to n. It is denoted by 'n!'.
For example 4! = 1x2x3x4 = 24. This concept is used in *combinations*.

__Factoring__

The method to break down a number into its factors. we can factor a number, factor a polynomial.,

__Factor tree__

A method or graphical representation to find the prime factors of a number.

More words on math dictionary-f as follows:

__Fahrenheit__

Fahrenheit is a temperature scale named after the famous scientist Daniel Gabriel Fahrenheit. Example The freezing point of water is 32ᵒF.

__Fibonacci sequence__

A sequence of numbers** 0,1,1,2,3,5,8,13,...**in which each number is equal to the sum of the previous two numbers. It is occurred by recurrence relation.

A set which is having the countable umber of elements is called the finite set.For example consider the set which is having the number 1 to 5.Here he number of elements in the set is countable that is 5.So we are saying that this set is finite set.

__Formula__

Rules and sentences which are written in math language is called as formula.

The formula to find perimeter of the rectangle

P = 2(l+b).

Here L represents length and b represents breadth.

**Fractal:**

An image constructed using complex numbers by a computer is called as fractal.

It consists of two numbers separated by a line. To represent fraction we use horizontal line to separate the upper part (how many parts are taken into consideration) and lower part (the total number of parts).Upper part is called as numerator and lower part is called as denominator.

**Function**

A function is a relationship where for each input we have an output as image.

“Mathematics, without this we can do nothing in our life. Each and everything around us is math.

Math is not only solving problems and finding solutions and it is also doing many things in our day to day life. They are:

It subtracts sadness and adds happiness in our life.

It divides sorrow and multiplies forgiveness and love.

Some people would not be able accept that the subject Math is easy to understand. That is because; they are unable to realize how the life is complicated. The problems in the subject Math are easier to solve than the problems in our real life. When we people are able to solve all the problems in the complicated life, why can we not solve the simple math problems?

Many people think that the subject math is always complicated and it exists to make things from simple to complicate. But the real existence of the subject math is to make things from complicate to simple.”

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**Math Dictionary **