Maths Terms for 11-13 Yr Olds

A quadrilateral whose opposite sides are parallel and consequently equal in length.

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.

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.

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).

In geometry, a two-dimensional diagram of a three-dimensional object, usually the view from directly above.

A flat surface. A line segment joining any two points in the surface will also lie in the surface.

The process of marking points. Points are usually defined by co-ordinates and plotted with reference to a given coordinate system. Noun - a collection of these points on a graph.

An element, in geometry, that has position but no magnitude, for example a corner (vertex).