Eduqas GCSE Mathematics key terms

Outcomes that each have the same chance of occurring.

Outcomes that have the same probability of occurring.

A mathematical statement that two expressions are equal, written using $=$. Its solutions are the values that make the equality true.

At equal distances from specified points or lines. Distance to a line is measured perpendicularly.

A triangle with three equal sides and three angles of $60^\circ$.

Expressions that have the same value for every allowed value of their variables, even if they are written differently.

Fractions that represent the same value, such as $\frac12$ and $\frac24$.

A ratio with the same relative values as another ratio, obtained by multiplying or dividing all its terms by the same non-zero number.

An inequality describing all possible original values consistent with a stated rounded or truncated value.

An approximate value inferred from available information, rather than an exact value known for the whole population.

To calculate the numerical value of an expression.

An outcome or collection of outcomes of a probability experiment, such as rolling an even number.

A value written without rounding or approximation, for example $\sqrt{2}/2$ rather than $0.707$.

A relationship stating how much of one currency has the same value as an amount of another currency.

Response choices that cover every possible answer relevant to the question.

A set of events that includes every possible outcome, so at least one of the events must happen.

Multiply out brackets to write an equivalent expression as a sum or difference of terms.

The number of times an outcome is predicted to occur in a specified number of trials, calculated as the number of trials multiplied by its probability.

The power to which a number is raised, also called an index. In $10^4$, the exponent is $4$; $10^{-4}$ means $\frac{1}{10^4}$.

A decrease in which a quantity is multiplied by the same factor between 0 and 1 in each equal time period.

A function with the variable in the exponent, such as $y = k^x$ for a positive constant $k$.

A graph in which the input variable appears in the exponent, such as $y=2^x$. Equal increases in the input multiply the output by the same factor.

An increase in which a quantity is multiplied by the same factor, greater than 1, in each equal time period.

A number, variable or combination of these joined by operations, representing a value without stating an equality or inequality.

An angle between a polygon’s side and the extension of an adjacent side. For a convex polygon, it adds to the adjacent interior angle to make $180^\circ$.

Estimating a value beyond the range of the observed data by extending an apparent trend.

A flat surface on the outside of a solid.