Mathematics key terms

The point halfway along a line segment, equally distant from its two ends.

The shorter of the two arcs joining two points on a circle; its central angle is less than $180^\circ$.

The smaller sector formed by two radii, 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 whole number and a proper fraction written together, such as $2\frac{1}{4}$.

The class interval with the greatest frequency in grouped data.

The value or category occurring most frequently in a data set.

A quadratic expression whose coefficient of $x^2$ is $1$.

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

A chart with bars placed side by side within each category so that two or more groups can be compared.

A number multiplied by π, such as 4π or π/2.

A number that can be written as $kq$, where $q$ is an integer.

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

The number used to multiply one quantity to obtain another.

Events that cannot both happen in the same trial.

Events that cannot both occur in the same trial.

A relationship in which y generally decreases as x increases.

An index that represents a reciprocal: $a^{-n}=\frac{1}{a^n}$, where .

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

The reciprocal of a number with its sign changed; the negative reciprocal of $m$ is $-1/m$.

A flat arrangement of a solid’s faces that can be folded to make the solid.

The quantity after the percentage increase or decrease has been applied.

A pattern with no clear tendency for y to increase or decrease as x increases.

A calculation completed using written or mental methods rather than a calculator.

A quadratic expression whose coefficient of $x^2$ is not $1$.

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

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

A formula giving the value of a term from its position number $n$.

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

A straight line on which numbers increase from left to right.