OCR GCSE Mathematics key terms

The single vector with the same overall effect as two or more successive vectors.

A method of finding an original quantity when its value after a percentage change is known.

A quadrilateral with four equal sides.

An angle of exactly $90^\circ$.

A triangle containing one 90° angle.

A solid with the same cross-section throughout its length and two parallel, matching end faces. In a right prism, the length is perpendicular to the end faces.

A solution of an equation of the form $f(x)=0$; graphically, it is an $x$-coordinate where $y=f(x)$ meets the $x$-axis.

A transformation that turns a shape through a specified angle and direction about a fixed point.

Symmetry in which a shape can be turned through an angle smaller than 360° about a fixed point and still look unchanged.

Replacing a number with a nearby, simpler value at a stated degree of accuracy.

A marked straightedge used to draw straight lines and measure their lengths.

A subset of a population from which data are collected.

The complete set of possible outcomes of a random experiment.

A table that organises possible outcomes, often with one event along the top and another down the side.

A list of all members of the population from which a sample can be selected.

An ordinary number used to multiply a vector.

The values attached to positions along an axis, including the amount represented by each interval.

An accurate representation in which every drawn length has the same proportional relationship to the corresponding actual length.

The multiplier that determines the size of an enlargement.

A triangle with no equal sides.

A power of 10 such as 10, 100 or 1000, used to scale both numbers in a decimal division without changing the quotient.

A graph on which paired values of two variables are plotted as separate points.

A graph that plots paired numerical values as points to show any relationship between two variables.

A pattern of rises and falls that repeats at regular times, such as each year.

The changes between consecutive first differences. They are constant for a quadratic sequence.

A region of a circle bounded by two radii and the arc between them.

A region bounded by a chord and the arc joining the chord's endpoints.