Mastering Maths: Key Terms Glossary Part 1

Created by Team 11+ Connect

>	greater than
<	less than
2D SHAPES	2D shapes are two-dimensional (flat). Examples of 2D shapes include squares, rectangles, circles and triangles.
3D SHAPES	3D shapes are three-dimensional. Examples of 3D shapes include prisms, cylinders, spheres and cubes,
ACUTE ANGLE	An angle that measures less than 90 degrees.
ALGEBRA	The part of mathematics that deals with generalised arithmetic. Letters are used to denote variables and unknown numbers.
ANALOGUE CLOCK	A circular-faced clock with the numbers one to twelve around the outside and two hands, a shorter one to measure hours and a longer one to measure minutes.
ARC	A portion of a curve.
AREA	The amount of space taken up by a 2D shape or surface. We measure area in square units: cm² or m².
ARRAY	An ordered collection of counters, numbers etc. in rows and columns.
ASCENDING ORDER	Numbers ordered from smallest to largest.
AVERAGE	The ordinary or typical value.
AXES	The horizontal and vertical lines used to frame a graph or chart.
BAR CHART	A format for representing statistical information.
BRACKETS ()	Symbols used to group numbers in arithmetic, or letters and numbers in algebra.
CAPACITY	The volume of a material held in a container.
CENTI-	Prefix meaning one-hundredth (of)
CIRCLE	A 2D curved shape, every point of which is the same distance from a fixed point in the centre.
CIRCUMFERENCE	The measurement around the outside edge of a circle.
CLOCKWISE AND ANTI-CLOCKWISE	Clockwise - moving in the same direction as the hands Anti-clockwise - moving in the opposite direction.
COLUMN	The vertical arrangement of numbers, data, etc.
CONE	A three-dimensional shape with a circular base and a point (apex).
CONVERT	To change from one quantity or measurement to another.
CUBE	A three-dimensional shape with six square faces.
CUBOID	A three-dimensional shape with six rectangular faces
CYLINDER	A three-dimensional shape with two circular ends and a hollow tube in the middle.
DATA	Information consisting of quantities e.g. percentages, counts, etc,
DECAGON	A 10-sided shape.
DECIMAL	A number expressed in a scale of 10s.
DEGREES	The unit of measurement used for angles.
DENOMINATOR	The bottom number of a fraction.
DESCENDING ORDER	Numbers ordered from largest to smallest.
DIAGONAL	Two corners of a shape that are not next to each other.
DIAGRAM	A picture or representation.
DIAMETER	The straight line going through the centre of a circle.
DIGIT	A number e.g. 3, 5, 9, etc.
DISSECTION	To cut/separate into parts.
DIGITAL CLOCK	A clock that displays time as hours and minutes. E.g. 3:30 pm would be displayed as 15;30.
DODECAGON	A 12-sided shape.