Maths Terms for 11-13 Yr Olds

A systematic arrangement of numbers, shapes, values or other objects according to a rule.

A polygon with five sides and five interior angles. Adjective: pentagonal, having the form of a pentagon.

A fraction expressed as the number of parts per hundred and recorded using the notation %. Example: One half can be expressed as 50%; the whole can be expressed as 100%.

Noun: a line or plane that is at right angles (90 degrees) to another line or plane. Adjective: having this property.

The length of any circle divided by the length of its diameter is a constant called pi, which has the symbol below.

Pi is an irrational number. It has an infinite number of non-repeating decimal places. To 8 decimal places, pi is 3.14159265.

A format for representing statistical information using pictures. Suitable pictures, symbols or icons are used to represent objects. For large numbers one symbol may represent a number of objects and a part symbol then represents a rough proportion of the number.

Also known as pie graph. A form of presentation of statistical information - within a circle, sectors like the slices of a pie represent the quantities involved. The frequency or amount of each quantity is proportional to the angle at the centre of the circle.

An imperial measure of volume applied to liquids or capacity. In the imperial system, 8 pints is equal to 4 quarts, or 1 gallon. 1 pint is just over 0.5 litres in metric (568ml).

The value of a digit that relates to its position or place in a number. Example: in 1482 the digits represent 1 thousand, 4 hundreds, 8 tens and 2 units respectively; in 12.34 the digits represent 1 ten, 2 units, 3 tenths and 4 hundredths respectively.