Page 196 - Mathematics Coursebook

Glossary

12-hour clock a system of measuring time certain an event that will happen is certain 153
in terms of a repeating period of 12 hours 144 chance describes something that may or
24-hour clock a system of measuring time may not happen 153
in terms of a repeating period of 24 hours 144 class a group of numbers or measurements 105

2D shape !at shape, having length and class interval the width of a group or
width but no depth 87 interval in a grouped frequency table 68
3D shape shape having three dimensions 87 clockwise turning in the same direction
acute angle an angle less than 90 degrees 54 as the hands of a clock 164
angle a measure of turn, measured in collecting like terms gathering, by addition
degrees 54 and subtraction, all like terms 98
anticlockwise turning in the opposite common factor a number that is a factor
direction from the hands of a clock 164 of two di#erent numbers; 3 is a common

approximate round a number to a suitable factor of 15 and 24 12
degree of accuracy 37 common factor a number that divides into
area the amount of surface covered other numbers without remainder 73
by a !at shape 170 common multiple a number that is

ASA used in constructions, an a multiple of two di#erent numbers;
abbreviation of Angle Side Angle or 24 is a common multiple of 2 and 3 11
the size of two angles and the length of compound shape (or composite shape),
the side between them, minimum a shape made up from simpler shapes 173
information to construct a triangle 122 cone a solid which tapers from a circular
average a representative value; base to a point 87
mode, median and mean are examples 105 congruent identical in shape and size 161
axis one of two number lines drawn consecutive terms terms next to
in a coordinate grid 129 one another in a sequence 20
bar chart a diagram where values are conversion factor a multiplier for
represented by the length of bars 181 converting from one unit to another 170

bar-line graph a diagram where values coordinate two numbers use to
are represented by the length of thick lines 181 identify a point, written in brackets as,

brackets used to enclose items that are for example, (4, 6) 129
to be seen as a single expression. 100 coordinate grid two axes used to plot

cancel "nd an equivalent fraction by points, using coordinates 129
dividing both numerator and denominator cube a regular solid with six square faces 87
by a common factor (see ‘simplify’) 73 cubic centimetre (cm ) unit of volume;
3
capacity the volume of liquid that can volume of a cube of side 1 centimetre 175
be put into a container 47 cubic metre (m ) unit of volume; volume
3
centimetre (cm) one hundredth of a metre 47 of a cube of side 1 metre 175
centre of rotation the point about which cubic millimetre (mm ) unit of volume;
3
a shape is rotated 164 volume of a cube of side 1 millimetre 175

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