Edges: Segments connecting vertices in a network.

Element: An item in a matrix

Elimination Method: A method for solving a system of linear eqation of linear equations.

Equation: A statement that two expressions are equal.

Equivalent Equation: Equations that have the same solution.

Equilateral Triangle: A triangle with three equal sides.

Estimation: A way of approximating the answer to a question quickly.

Exponent: The number that indicates how many times the base is to be used as a factor.

Expression: A collection of terms combined by addition, subtraction, or both.

Extremes: The first and last terms in any proportion.

Evaluate: Substitute a given number for each va an then simplify.