AQA GCSE Mathematics key terms

Sides, edges, angles or other features that occupy matching positions in two shapes.

Points in the same relative position on an object and its image.

The ratio of the side adjacent to an angle to the hypotenuse in a right-angled triangle.

A formula relating all three sides of a triangle to one angle, for example $a^2=b^2+c^2-2bc\cos A$.

The amount paid to buy or make an item before selling it.

A value or example that shows a general claim is false.

Money entering a bank account, increasing its balance.

A value of x where the corresponding quadratic expression equals zero; it marks a possible boundary between solution intervals.

A flat shape made by cutting through a solid; the matching end face of a right prism is a cross-section.

A number that can be written as $n^3$, where $n$ is a positive integer.

A polynomial function whose highest non-zero power of the variable is 3, such as $y=x^3-4x$.

A unit raised to the power three, such as cm³ or m³, used to measure volume.

The running total of frequencies up to a stated value or class boundary.

A bent, rather than flat, part of the surface of a 3D shape.

A quadrilateral whose four vertices lie on one circle.

Money leaving a bank account, reducing its balance.

A change in which a quantity decreases over time, often by the same proportion or percentage in each period.

A number written using place value and a decimal point, such as $4.27$ or $-0.6$.

The number of digits written after the decimal point.

The point separating the units digit from the tenths digit in a decimal number.

The level of precision used to state a value, such as a given number of decimal places or significant figures.

The number below the fraction line; it represents the quantity with which the first quantity is being compared.

Mass per unit of volume.

Events for which the occurrence of one changes the probability of a later event.

A repeated decrease in the value of an item, usually expressed as a percentage per time period.

The distance from the front of an object to its back.

Arranging values from largest to smallest.