Looking for math words that start with E?

From Edge to Ellipsoid and Exponent Rules, there are loads of math-related words beginning with the letter E.

Here is a list of some of the most common and useful E-letter math words:

## Math Words That Start With E

**Eccentricity **– the eccentricity of a conic section is a non-negative real number that uniquely characterizes its shape.

**Echelon Form **– In linear algebra, a matrix is in echelon form if it has the shape resulting from a Gaussian elimination.

**Edge **– a particular type of line segment joining two vertices in a polygon, polyhedron, or higher-dimensional polytope.

**Element Of A Matrix** – set of numbers arranged in rows and columns so as to form a rectangular array.

**Element Of A Set **– an element of a set is any one of the distinct objects that belong to that set.

**Ellipse **– a circle that has been stretched in one direction, to give it the shape of an oval.

**Ellipsoid **– closed surface of which all plane cross sections are either ellipses or circles.

**Elliptic Geometry **– a geometry in which no parallel lines exist.

**Empty Set **– the empty set is the unique set having no elements; its size or cardinality (count of elements in a set) is zero.

**End Behavior **– describes the behavior of the graph of the function at the “ends” of the x-axis.

**Epsilon **– a greek letter to choose any small number arbitrarily to solve any mathematical problem.

**Equal Sign **– the sign =, which is used in arithmetic to indicate that two numbers or sets of numbers are equal.

**Equation **– a statement that the values of two mathematical expressions are equal (indicated by the sign =).

**Equation Of A Line **– any equation that conveys information about a line’s slope and at least one point that lies on it.

**Equiangular Triangle **– an equilateral triangle is a triangle in which all three sides have the same length.

**Equidistant **– A point is said to be equidistant from a set of objects if the distances between that point and each object in the set are equal.

**Equilateral Triangle **– a triangle in which all three sides have the same length.

**Equivalent Equations **– Two systems of equations are equivalent if they have the same solution(s).

**Equivalence Relation **– a binary relation that is reflexive, symmetric and transitive.

**Error **– the difference between a true value and an estimate, or approximation, of that value.

**Eta **– eta function may refer to: The Dirichlet eta function η(s), a Dirichlet series.

**Euclidean Geometry** – a mathematical system attributed to Alexandrian Greek mathematician Euclid, which he described in his textbook on geometry: the Elements.

**Euler Line **– the Euler line, named after Leonhard Euler, is a line determined from any triangle that is not equilateral.

**Euler’s Formula **– a mathematical formula in complex analysis that establishes the fundamental relationship between the trigonometric functions and the complex exponential function.

**Evaluate **– to judge or determine the significance, worth, or quality of; assess: to evaluate the results of an experiment.

**Even Function **– even functions and odd functions are functions which satisfy particular symmetry relations, with respect to taking additive inverses.

**Even Number **– a whole number that is able to be divided by two into two equal whole numbers The numbers 0, 2, 4, 6, and 8 are even numbers.

**Event **– In probability theory, an event is an outcome or defined collection of outcomes of a random experiment.

**Exclusive (Interval)** – Excluding the endpoints of an interval. For example, “the interval from 1 to 2, exclusive” means the open interval written either (1, 2) or ]1, 2[.

**Expand **– To expand a bracket means to multiply each term in the bracket by the expression outside the bracket.

**Expected Value **– an anticipated value for an investment at some point in the future.

**Experiment **– any activity with an observable result.

**Explicit Differentiation **– a function that is expressed clearly.

**Explicit Formula Of A Sequence **– a formula we can use to find the nth term of a sequence. In the easiest definition, explicit means exact or definite.

**Explicit Function** – a mathematical function containing only the independent variable or variables —opposed to implicit function.

**Exponent **– a symbol written above and to the right of a mathematical expression to indicate the operation of raising to a power.

**Exponent Rules **– The exponent of a number says how many times to use the number in a multiplication.

**Exponential Decay **– When a population or group of something is declining, and the amount that decreases is proportional to the size of the population, it’s called exponential decay

**Exponential Function **– a mathematical function denoted by f(x)=\exp or e^{x}.

**Exponential Growth **– process that increases quantity over time.

**Exponential Model **– a mathematical model in which the variable is in the exponent.

**Exponentiation **– mathematical operation, written as bn, involving two numbers, the base b and the exponent or power n, and pronounced as “b raised to the power of n”.

**Expression **– a finite combination of symbols that is well-formed according to rules that depend on the context.

**Exterior Angle** – the angle between a side of a polygon and an extended adjacent side.

**Extraneous Solution** – a solution, such as that to an equation, that emerges from the process of solving the problem but is not a valid solution to the problem.

**Extreme Value Theorem** – In calculus, the extreme value theorem states that if a real-valued function f is continuous on the closed interval [a, b], then f must attain a maximum and a minimum, each at least once.

I hope you found the words you were looking for from the list above.

This isn’t an exhaustive list, if there are any math words starting with the letter E that you would like added to the list, please leave me a comment below.

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*Image credits – Photo by Joshua Hoehne on Unsplash*