| A | B | C | D | E | F | G | H | I | J | K | L | M |
| N | O | P | Q | R | S | T | U | V | W | X | Y | Z |
|
A |
|
|---|---|
| Acute angle | An angle less than 90º. |
| Arc | Part of a circumference of a circle. |
| Area | The amount of space a shape takes up. E.g. the area of the lawn is 35m2. |
| Average | A value to best represent a set of data. There are three type of average - the mean, the median and the mode. |
| B | |
| BIDMAS | A way of remembering the order in which
operations are carried out. It stands for Brackets - Indices - Division - Multiplication - Addition - Subtraction. |
| C | |
| Centimetre (cm) | A measure of distance.
1 centimetre = 10 millimetres.
(1 cm = 10 mm). 100 centimetres = 1 metre. (100 cm = 1 m). |
| Centilitre (cl) | A measure of volume.
100 centilitres = 1 litre
(100 cl = 1 l). 1 centilitre = 10 millilitres (1 cl = 10 ml). |
| Circumference | The perimeter of a circle. |
| Constant | A letter or symbol whose value always stays the same. The constant π is a common example. |
| Cross section | The end section created when you slice a 3D shape along it's length. |
| D | |
| Day | A time period of 24 hours. There are 7 days in a week. |
| Denominator | The bottom part of a fraction. |
| Diameter | The distance across a circle which passes through the centre. |
| E | |
| Equation | Two expressions which have the same value, separated by an "=" sign. E.g. 3y = 9 + y |
| Estimate | To find an approximate answer to a more difficult problem. E.g. 31.2 x 5.94 is roughly equal to 30 x 6 = 180. |
| Expression | A collection of terms which can contain variables (letters) and numbers. E.g. 4pq - q + 7 |
| F | |
| Factor | A number that divides another number exactly. E.g. 4 is a factor of 12. |
| Frequency | How many times something happens. Another word for "total". |
| G | |
| Gradient | How steep a line is. Found by dividing the distance up by the distance across. |
| Gram (g) | A measure of mass. 1 gram = 1000 milligrams. (1 g = 1000 mg) |
| H | |
| HCF | Stands for "highest common factor". It is the largest factor common to a set of numbers. E.g. The HCF of 16 and 24 is 8. |
| Heptagon | A seven sided polygon. |
| Hexagon | A six sided polygon. |
| Hypotenuse | The longest side on a right angled triangle. |
| I | |
| Integer | A whole number. |
| Irrational | A decimal which is never ending. It must also not be a recurring decimal. |
| J | |
| Justify | Another word for "explain". Often crops up on your maths exam. E.g. "Calculate the mean and range for each player. Who is the better player? Justify your answer." |
| K | |
| Kilogram (Kg) | A measure of mass. 1 kilogram = 1000 grams. (1 kg = 1000 g) |
| Kilometre (Km) | A measure of distance. 1 kilometre = 1000 metres. (1 km = 1000 m) |
| L | |
| LCM | Stands for "lowest common multiple". It is the smallest multiple common to a set of numbers. E.g. The LCM of 3 and 4 is 12. |
| Litre (l) | A measure of volume.
1 litre = 100 centilitres
(1 l = 100 cl). 1 litres = 1000 millilitres (1l = 1000 ml). |
| M | |
| Mean | A type of average found by adding up a list of numbers and dividing by how many numbers are in the list. |
| Median | The middle value when a list of numbers is put in order from smallest to largest. A type of average. |
| Metre (m) | A measure of distance. 1 metre = 100 centimetres. (1 m = 1000 cm). |
| Millimetre (mm) | A measure of distance. 10 millimetres = 1 centimetre. (10 mm = 1 cm). |
| Millilitre (ml) | A measure of volume.
10 millimetres = 1 centilitre
(10 ml = 1 cl). 1000 millilitres = 1 litre (1000 ml = 1 l). |
| Mode | The most common value in a list of numbers. If two values are tied then there is two modes. If more than two values are tied then there is no mode. A type of average. |
| Modal | Another term for mode |
| Month | A time period of either 28, 30 or 31 days. There are 12 months in a year. |
| Multiple | A number which is part of another number's times table. E.g. 35 is a multiple of 5. |
| N | |
| Natural number | A positive integer |
| Negative | The value less than zero. |
| Numerator | The top part of a fraction. |
| O | |
| Obtuse angle | An angle between 90º and 180º. |
| Octagon | An eight sided polygon. |
| Operation | An action which when applied to one or more values gives an output value. The four most common operations are addition. subtraction, multiplication and division. |
| P | |
| Parallel | Two or more lines which are always the same distance apart. |
| Pentagon | A five sided polygon. |
| Perimeter | The distance around a shape. |
| Perpendicular | Two or more lines which meet at right angles. |
| Pi (π) | An irrational constant used when calculating the area and circumference of circles. It is approximately equal to 3.14. |
| Polygon | A shape made from straight lines. |
| Prism | A 3D shape with the same cross section all along its length. |
| Product | The answer when two values are multiplied together. |
| Q | |
| Quadrilateral | A four sided polygon. |
| R | |
| Radius |
The distance from the centre of a circle to its circumference. The plural of radius is radii. |
| Range |
The largest number take away the smallest value in a set of data. |
| Rational | A decimal number which ends or is recurring. |
| Recurring | A decimal which never ends but repeats all or parts of the sequence of numbers after the decimal point. E.g 0.333333 or 0.141414. |
| Reflex angle | An angle greater than 180º. |
| Right angle | An angle of 90º. |
| S | |
| Sum | The answer when two or more values are added together. |
| T | |
| Term | A number, variable or combination of both which forms part of an expression. |
| Triangle | A three sided polygon. |
| U | |
| Units | A quantity used to describe a measurement. Examples are kilograms, metres and centilitres. |
| V | |
| Value | A numerical amount or quantity. |
| Variable | A letter which we don't know the value of. |
| Volume | The amount an object can hold. E.g. a bottle of cola has a volume of 2 litres. |
| W | |
| Week | A time period of 7 days. |
| Wide | Used to describe the width of something |
| Width | The distance from side to side. E.g. "The swimming pool is 10 metres wide." |
| X | |
| X-Axis | The horizontal axis on a graph. The line going across the page. |
| Y | |
| Y-Axis | The vertical axis on a graph. The line going from top to bottom. |
| Y-Intercept | The value of the y-coordinate when a graph crosses the y-axis. |
| Year | A time period of 12 months or 365 days. (366 in a leap year) |
| Z | |