# maths Key words

- Created by: reshana
- Created on: 17-11-20 20:37

A
**Acute angle**
An angle less than 90°.
**Adjacent**
Adjacent sides are next to each other and are joined by a common vertex.
**Algebra**
Algebra is the branch of mathematics where symbols or letters are used to represent numbers.
**Angle**
An angle is formed when two straight lines cross or meet each other at a point. The size of an angle is measured by the amount one line has been turned in relation to the other.
**Approximate**
An approximate value is a value that is close to the actual value of a number.
**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 35 square metres.
**Asymmetrical**
A shape which has no lines of symmetry.
**Average**
A value to best represent a set of data. There are three types of average - the mean, the median and the mode.
**Axis**
An axis is one of the lines used to locate a point in a coordinate system.
B
**Bearing**
A three digit angle measured from north in a clockwise direction.
**BIDMAS**
A way of remembering the order in which operations are carried out. It stands for Brackets - Indices - Division - Multiplication - Addition - Subtraction.
**Bisect**
To divide an angle or shape exactly in half.
**Brackets**
Used to determine the order in which operations are carried out. For example, 3 + 4 x 2 = 11 but (3 + 4) x 2 = 14.
C
**Calculate**
To work out the value of something. This does not have to mean you need a calculator!
**Centilitre (cl)**
A measure of volume. 100 centilitres = 1 litre (100 cl = 1 l). 1 centilitre = 10 millilitres (1 cl = 10 ml).
**Centimetre (cm)**
A measure of distance. 1 centimetre = 10 millimetres. (1 cm = 10 mm). 100 centimetres = 1 metre. (100 cm = 1 m).
**Chord**
A straight line drawn from one point on the edge of a circle to another.
**Circumference**
The perimeter of a circle.
**Coefficient**
The number in front of an algebraic symbol. For example the coefficient of 5x is 5.
**Congruent**
If you can place a shape exactly on top of another then they are said to be congruent. You may rotate, reflex or translate the shape.
**Constant**
A letter or symbol whose value always stays the same. The constant Π is a common example.
**Credit**
To add money to a bank account. For example, I had £500 credited to my bank account.
**Cross section**
The end section created when you slice a 3D shape along it's length.
**Cube number**
The product when an integer is multiplied by itself twice. For example 5 cubed = 5 x 5 x 5 = 125.
**Cuboid**
A 3D shape with all sides made from rectangles.
**Cumulative frequency**
A running total of the frequencies, added up as you go along.
D
**Day**
A time period of 24 hours. There are 7 days in a week…

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