Edexcel GCSE Mathematics key terms

The greatest whole number that divides exactly into every number being considered.

A diagram for grouped numerical data in which class intervals form touching bars and each bar's area represents its frequency.

The longest side of a right-angled triangle; it is opposite the right angle.

An equality that is true for every permissible value of its variable or variables.

The figure produced by a transformation.

A fraction whose numerator is greater than or equal to its denominator, so its value is at least $1$.

The angle formed where the two sides used in the area formula meet.

Events for which knowing that one has happened does not change the probability of the other.

The small raised number in a power; it shows how many times the base is used as a factor when it is a positive integer.

A mathematical statement that compares two expressions using $<$, $>$, $\leq$ or $\geq$.

A sequence that continues without a final term.

The value put into a function.

The rate at which one quantity is changing at one particular point or moment; graphically, it is the gradient of the tangent there.

A whole number, including positive whole numbers, negative whole numbers and zero.

A point at which a graph crosses an axis.

Money paid for borrowing money, or money earned by allowing a bank or other organisation to use savings.

The percentage of the principal paid or earned as interest during a stated time period.

An angle inside a polygon at one of its vertices.

An answer left using the symbol $\pi$, rather than replacing $\pi$ with a rounded decimal.

Using a trend to estimate a value within the range of the observed data.

The difference between the upper and lower quartiles, measuring the spread of the middle 50% of the data.

The event containing outcomes that belong to both A and B, written $A\cap B$.

A property or point that is unchanged by a transformation or a sequence of transformations.

A point whose image is in exactly the same position as the original point.

A function that reverses the mapping of another function, turning its outputs back into the original inputs.

The notation for the inverse of the function $f$; it is read as “$f$ inverse of $x$”.

A calculation that reverses another calculation, such as subtraction reversing addition.