# Maths Glossary for 11 Plus Exam

An angle whose measure is greater than 0° and less than 90°

A triangle in which all three angles are acute

Angles that share a common side, have the same vertex , and do not overlap

the part of maths that deals with finding missing numbers in equations.

the time between midnight and midday

the time written in words using a clock with hands.

A geometric figure formed by two rays that have a common endpoint

the surface of a shape measured in square units

- e.g. square centimetres or cm
^{2} - square metres or m
^{2}

a part of the circumference of a circle.

how much liquid a container will hold, measured in litres (l) or millilitres (ml), or pints or gallons. Same as volume

the distance around a circle.

moving around a circle or a point in the direction of the hands of the clock

Having the same size and shape

numbers that follow on in order.

circles that share the same centre point but have a different radius.

a coordinate is a pair of numbers used to locate a point.

The first number is the distance along the horizontal line and the second number is the distance along the vertical line.

a cube is a regular 3-D solid shape where every face is an identical square and every angle is a right angle.

the volume of a cube that is 1 cm wide, 1 cm deep and 1 cm high

cubic centimetre = cm^{3}

a 3-D solid shape where each surface is a rectangle (includes squares) and every angle is a right angle

a 3-D solid with two flat circular faces joined by one curved surface

A number that uses place value and a decimal point to show tenths, hundredths, thousandths, and so on

Example

- 43.21

degree (^{o}) is the unit of measurement for

- temperature
- the unit of measurement of angles, with 360 degrees making one complete turn

The bottom part of a fraction

the time written in numbers, as you would see on a digital clock.

the distance across a circle passing through the centre

to find the difference between two numbers, take the smaller number away from the larger number

a digit is any of the numerals 0, 1, 2, 3, 4, 5, 6, 7, 8, 9

1 dozen = 12

the edge of a solid shape is the line along which two adjacent faces meet

a number sentence where one thing is equal to something else.

has 3 equal sides and 3 equal angles.

fractions written with different denominators, but with the same value

- 1/2 and 3/6 are equivalent fractions

which are exactly divisible by 2

Even numbers finishes with a 0, 2, 4, 6, or 8

a visual way of displaying data; it can have bars, lines or pictures representing the data.

sign meaning ‘is greater than’

The HCF of a set of numbers is the largest number that is a factor of all numbers in the set.

a top-heavy fraction where the numerator is larger than the denominator

triangle with 2 equal sides and 2 equal angles

sign meaning ‘is greater than’

the LCM of a set of numbers is the smallest number that is a multiple of all numbers in the set.

A ratio that compares the distance on a map with the actual distance

the average value of a set of numbers, found by adding up all of the values and dividing by the number of values

the mid-point of a set of data when the numbers are put in order of size

the lowest value mode the most common value in a set of data

a mixture of a whole number and a fraction.

the number in a set of data that comes up most

A number that is the product of a given number and a whole number

Example:

- To find the multiples of any number, multiply the number by the counting numbers 1, 2, 3, 4, and so on.
- The first six multiples of 4 are 4, 8, 12, 16, 20, 24.

Number less than 0

An arrangement of two-dimensional figures that fold to form a three-dimensional figure

The top part of a fraction

A mathematical phrase that includes only numbers and operation symbols

Examples:

- 30 + 34
- 84 ÷ 7
- 34 – 3

An angle whose measure is greater than 90° and less than 180°

A triangle that has one obtuse angle

a quadrilateral whose opposite sides are parallel and congruent

a proportion when stated out of 100 and mark with % symbol

the distance around the edge of a 2-D shape

Lines that intersect to form 90° angles, or right angles

a circle where sectors are marked with their areas representing the proportion of that part of a group of categories

a number that only has two factors, 1 and itself

the first prime numbers are : 2, 3, 5, 7, 11, 13, 17, 19, 23….

a 3-D solid with two identical faces parallel and joined by parallelograms, which are at right angles to the end faces in a right- angled (right) prism

The answer in a multiplication problem

- 6 x 3 = 18 18 is the product of 6 times 3
- 18 is the product of 6 times 3

a 2-D polygon with four sides and four angles

one-fourth of a whole or 1/4

the length of a straight line from the centre of a circle to the circumference

the difference between the largest and the smallest value in a set of numbers

Example

- number set : 2, 10, 8, 7, 11
- Range is: 11 – 2 = 9

A comparison of two numbers or quantities

Example:

- 3 to 5
- 3:5
- or 3/5

a quadrilateral with opposite pairs of sides parallel and of equal lengths and all 4 angles are right angles

the number left over when one number doesn’t divide exactly into another.

an angle greater than 180^{o}

the figure formed by flipping a geometric figure over a line of reflection to obtain a mirror image

an angle of 90^{o}

A triangle with exactly 1 right angle

turning a shape around a given point or centre of rotation, either clockwise or anticlockwise.

A figure has rotational symmetry when it can be rotated less than 360° around a central point, or point of rotation and still match the original figure

A triangle with no congruent sides (all side lengths are different)

a set of numbers where there is a pattern determining the difference between each term of the series

A fraction is in simplest form when the numerator and denominator have no common factors other than 1

a shape has symmetry when it can be divided into two equal, mirror images.

a method of recording data using short lines, one for each object or count, grouped into fives for easy addition

A movement that doesn’t change the size or shape of a figure is a rigid transformation.

moving a shape right or left a given number of squares and up or down a given number ot squares.

A display which shows relationships among sets by using ovals or other shapes to represent individual sets

- the point where two or more rays meet
- the point of intersection of two sides of a polygon
- the point of intersection of three or more edges of a solid figure
- the top point of a cone

the amount of space within a solid shape

the name given to the horizontal line going across a graph

the name given to the vertical line going along a graph

sign meaning ‘is less than’