OCR GCSE Mathematics key terms

A unit used to measure area, formed by multiplying one length unit by another, such as cm².

A way of writing a non-zero number as $a\times10^n$, where $1\leq |a|<10$ and $n$ is an integer.

A calculator key, often labelled EXP or $\times10^x$, used to enter a number multiplied by a power of ten.

An angle measuring $180^\circ$, formed by two opposite rays with a common endpoint.

The standard form of a non-vertical straight-line equation, where $m$ is the gradient and $c$ is the $y$-intercept.

A comparison that excludes equality, using $<$ or $>$.

The variable isolated on one side of a formula, such as $v$ in $v=u+at$.

Notation in which a small number or expression written below a letter identifies a term's position, as in $u_4$ or $u_n$.

Replacing a letter in an expression or equation with a known value.

Formed by an arc or line segment whose endpoints lie on the two arms of the angle.

The angle formed at a point when lines are drawn from that point to both ends of a chord or arc.

The result of an addition.

A number that describes an aspect of a data set, such as its typical value or spread.

Two angles whose measures add to 180°.

A square root left in exact form when it does not simplify to a whole number, such as $\sqrt3$.

The outside boundary of a solid; it may include flat and curved parts.

The total area of the outside faces of a three-dimensional solid.

A method of listing outcomes in a consistent order so that each possible outcome appears exactly once.

A display that pairs selected input values of $x$ with the corresponding output values of $y$.

The starting point of a drawn vector.

A straight line that matches a curve’s direction at a particular point; its gradient gives the instantaneous rate of change there.

A number, a variable, or a product of numbers and variables separated from other terms by addition or subtraction.

A decimal with a finite number of digits after the decimal point.

A rule that calculates a term using one or more earlier terms.

A condition that is sufficient to prove that a quadrilateral is a particular type.

A coordinate substituted into an inequality to determine which side of its boundary contains the solutions.

A mathematical statement established as true by a logical argument.

A probability calculated from a mathematical model of an experiment, rather than from its recorded results.