Maths Terms for 11-13 Yr Olds

Unit of time. One-sixtieth of an hour. 1 minute = 60 seconds.

In the measurement of angles, 1/60 of a degree is also known as a minute.

1. In geometry, a plane figure in 2D composed of polygons which by folding and joining can form a 3D polyhedron.

2. Adjective meaning 'remaining after deductions'. Example: for businesses net profit is their profit after deducting all operating costs and expenses.

Any convention for recording mathematical ideas in writing and symbols. Example: Money is recorded using decimal notation e.g. £2.50.

Sometimes used to describe a non-square rectangle.

An angle greater than 90 degrees but less than 180 degrees.

A polygon with eight sides. Adjective: octagonal, having the form of an octagon.

A polyhedron (3D polygon) with eight faces. A regular octahedron has faces that are equilateral triangles.

A fixed point from which measurements are taken. See also Cartesian co-ordinate system. On a graph the origin is normally given by the point at which the x axis meets the y axis, at the co-ordinate (0,0).

Symbol: oz. An imperial unit of mass. In the imperial system, 16 ounces = 1 pound. 1 ounce is just over 28 grams.

In geometry, two lines that are always equidistant (the same distance apart). Parallel lines, curves and planes never meet.