Edexcel GCSE Mathematics key terms

A point that divides a line segment into two parts of equal length.

The shorter arc between two points on a circle, associated with a central angle less than $180^\circ$.

The line in which a graph is mirrored during a reflection, such as the $x$-axis or $y$-axis.

A number written as a whole number together with a proper fraction, such as $2\frac{1}{3}$.

The class interval containing the greatest frequency in grouped data.

The category that occurs most frequently.

A number obtained by multiplying a given integer by an integer.

A relationship in which one quantity is found by multiplying another by a fixed number.

The number by which a quantity is multiplied during each period of repeated change.

Events that cannot both occur in the same trial or along the same complete outcome path.

A relationship in which larger values of one variable tend to be paired with smaller values of the other.

A number less than zero, written with a negative sign, such as $-5$.

The result of taking the reciprocal of a non-zero number and changing its sign; the negative reciprocal of $m$ is $-\frac{1}{m}$.

Rewriting a result so that its coefficient lies in the required interval $1\leq A<10$.

An expression that gives the value of a term directly from its position $n$.

A rule that calculates a term directly from its position number $n$.

The top number of a fraction; it is the quantity being expressed or compared.

The figure before a transformation.

A circle that shows an endpoint is excluded from a solution set.

One of addition, subtraction, multiplication and division.

A number or instruction that acts on a quantity to produce another quantity.

The number with the same magnitude but the opposite sign; for example, the opposite of $-4$ is $4$.

The angle directly across the triangle from a particular side; side $a$ is opposite angle $A$.

The side directly across from the angle being considered.

A number written in its usual decimal notation rather than in standard form.

The point $(0,0)$, where the horizontal and vertical axes meet.

The value before the stated change took place; it represents 100% in a percentage-change problem.