OCR GCSE Mathematics key terms

An ordered list of numbers or other objects whose members are called terms.

Two or more transformations applied one after another in a specified order.

A collection of numbers or objects defined by a shared property.

A way of describing a set by stating the form of its members and the condition they satisfy, for example $\{x:x>3\}$.

The elevation obtained by looking straight at the solid from a stated side, commonly the right or left.

A change from a positive value of $f(x)$ to a negative value, or vice versa, between two input values.

Digits that communicate the precision of a number, counted from its first non-zero digit.

Shapes whose corresponding angles are equal and whose corresponding lengths are all in the same ratio.

Triangles that have the same shape: corresponding angles are equal and corresponding side lengths are in a constant ratio.

Interest calculated from the original principal in every period, so the same amount of interest is added each time.

A sample selected so that every member of the population has an equal chance of being chosen.

A whole-number ratio whose parts have no common factor greater than 1.

An algebraic expression written with no unnecessary factors or operations while keeping the same value.

To rewrite an expression in a more compact form without changing its value.

Reducing a fraction by dividing its numerator and denominator by common factors until no common factor greater than 1 remains.

Writing a fraction in an equivalent form in which the numerator and denominator have no common factor greater than 1.

A pair or set of equations that must be satisfied by the same values of the variables.

A pair of values that satisfies both equations at the same time.

A rule relating each side length of a triangle to the sine of its opposite angle: a/sin A = b/sin B = c/sin C.

A drawing that shows the essential position and shape of a graph without requiring every possible point to be plotted.

The height of a triangular face, measured from the apex at right angles to that face’s base edge.

A three-dimensional shape that occupies space.

A value of the variable that makes an equation true.

The set of all coordinate pairs that satisfy an inequality or a group of inequalities.

Distance travelled per unit of time, calculated using speed = distance ÷ time.

A round, ball-shaped solid with one continuous curved surface and no flat faces.

A quadrilateral with four equal sides and four right angles.