 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:

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.

If you’d like to explore more math words starting with different letters of the alphabet, click any of the letters below to go to the list for that letter:

Image credits – Photo by Joshua Hoehne on Unsplash