Page 196 - Cambridge+Checkpoint+Mathematics+Coursebook+9
P. 196
Glossary and index
inequality an expression like an equation nth term the general term of a sequence;
where = is replaced by < or > or ≤ or ≥ 132 using algebra to write the position-to-term
inscribed $tting exactly inside a circle, rule, where n represents the position number
with all vertices touching the circumference 78 of the term 18
interest a reward paid for lending money 107 order of operations the speci$c order in
interior angle the angle between two which the operations must be done, when
adjacent sides of a polygon that lies carrying out calculations involving more
inside the polygon 42 than one operation; see BIDMAS 23
inverse function the function that has plan a view of an object from overhead 50
the opposite e%ect; the inverse of the position-to-term rule a rule that allows
function ‘multiply by 2 then add 3’ any term in a sequence to be calculated,
is ‘subtract 3 then divide by 2’ 20 given its position number 16
invert and multiply a method of division power a number written using an
by a fraction; the ‘dividing’ fraction is inverted index; 3 to the power 4 is written
(turned upside down) and the two fractions as 3 = 3 × 3 × 3 × 3 = 81 11
4
are then multiplied 70 primary data data collected directly
isometric paper paper covered with by the researcher 59
lines that form congruent equilateral prism a solid 3-D object that has the same
triangles 48 cross-section along its length which is usually
jottings quickly written short notes, described to name the prism, for example, a
not full workings 24 triangular prism or a hexagonal prism 147
linear sequence a sequence of numbers pro"t a gain in money a&er a $nancial
in which the di%erence between consecutive example, you make a pro$t if you buy something
terms is the same 16 and then sell it for more than it cost 90
loci the plural of locus 121 Pythagoras’ theorem an equation
locus (plural loci) the path traced out relating the lengths of the sides of a
by a point moving according to a speci$c right-angled triangle: the sum of the
rule; for example, a circle is the locus of squares of the two short sides of the
points that are all the same distance from triangle is equal to the square of the
a given point 121 longest side (or hypotenuse) 75
loss the opposite of a pro$t; for example, regular polygon a polygon in which
you make a loss if you buy something and all the sides are the same length and
then sell it for less than it cost 107 all the angles are the same size 42
lowest common denominator the smallest relative frequency the proportion of
whole number that can be used as a times that a particular outcome occurs if an
denominator for two or more fractions 66 experiment or event is repeated 155
midpoint the centre point of a line segment 178 sample space diagram any diagram that
mutually exclusive (outcomes that) shows all the possible outcomes of an event 153
cannot both happen at the same time 152 scatter graph a graph showing linked
non-linear sequence a sequence of values of two variables that may or may not
numbers in which the di%erence between be related, where the data values are plotted
consecutive terms is not the same 16 as coordinate points 182
195
