Math Terms StartingWith R

In this page math terms startingwith r we are going to see definitions of mathematical terms starting with the letter "R". We have listed out almost terms in math starting with R.In math also it is very important to know the meaning of many important words which are being used in the subject math.Each term is defined and examples are provided where ever it is necessary. Links are given for every words, by using this students can learn the meaning and its application more clearly.



Rate of change

If a quantity y depends on and varies with quantity x the rate of change of y with respect to x is dy/dx.In other words we can define rate of change as the ratio of the rate of change in input values and rate-of-change in output values. Rate of change can be positive or negative.


math terms startingwith r

Radian is the ratio between the length of an arc and its radius. It is the standard unit of angular measure. 1 radian results in same arc length and radius.


n-th root of a quantity. A symbol used to indicate square of any number is called radical. The number which is under the root is called radical.  √3 is called square root of 3. 


math terms startingwith r

A line from the center to the point on the circle.


To multiply a number by itself a certain amount of time.

Example: 10 raise to the power 5 = 10⁵ = 10x10x10x10x10 = 100000.


Selecting an item from the given set of items without any order. That is like drawing a number from a hat.


The difference between the highest and lowest value.

Example: Range of the given numbers 97,46,29, 37,18 is 97-18= 79.


Ratio that compares two different kinds of numbers or units.

Example: miles per hour, dollars per pound.


Ratio that tells how one number is related to other number. Ratio of 'a' and 'b' is written as a/b or a : b

Rational number

 A number that can be expressed as a ratio of two numbers.

Rational expression

Rational expressions is a fraction of polynomial expressions. We can do all the operations like ordinary fractions with some considerations.

Rational zero theorem

Rational zeros theorem gives the possible rational zeros of a polynomial function. Equivalently the theorem gives all the possible roots of an equation.

The theorem states that

If f(x) = anxn+an-1xn-1+…. +a1x+a0 has integer coefficients and p/q(where p/q is reduced) is a rational zero, then .p is the factor of the constant term a0 and q is the factor of leading coefficient an.


A line that has a starting point but no end point.

Real number

All the whole, rational and irrational numbers are called real numbers.


Multiplicative inverse of a number. One of two numbers whose product is 1.

Example: Reciprocal of 2 is 1/2.

Ratio formula

Let A and B be two given points. Let P be a point on the line segment AB or AB produced. The P divides the line segment AB in to two segments AP and PB. the lengths of AP and PB are AP and PB. These lengths are in some ratio m:n or that is AP:PB =m:n or AP/PB =m/n. If P lies inside AB, we say that P divides AB internally in the ratio m:n. If P lies outside AB, that is P lies on AB produced, then we say P divides AB externally in the ratio m:n.


In natural language relations are kind of relationship between two sets of information.In other words, Relation is a set of ordered pairs, usually defined by some sort of rule.

Representation of set

Representation of set is being done usually in three forms:

  • Set builder or Rule form
  • Roster form or Tabular form
  • Statement form or Descriptive form

Remainder theorem

If a polynomial f(x) of degree n, which is divided by (x-a), then the remainder is f(a), which is a constant and f(x) can be written as

f(x) = q(x)(x-a)+f(a)

where q(x) is the quotient polynomial with degree n-1.

These are the math terms startingwith r.

Math Terms StartingWith R to Math Terms