General

Question 1

Area of a circle

Answer 1

A = PIE x R*2

Question 2

Area of a Parallelogram

Answer 2

A = bh

Question 3

Area of a trapezium

Answer 3

Half the sum of the parallel sides times the distance between them.

Question 4

Length of an arc

Answer 4

Angle/360 x PIE d

Question 5

Area of a sector

Answer 5

Angle/360 PIE r*2

Question 6

Inequalities on a number line - Open circle means…

Answer 6

< or > - not equal to

Question 7

Inequalities on a number line - Closed circle means…

Answer 7

or >/ - or equal to

Question 8

Estimate probability =

Answer 8

number of successful trials / total number of trials

Question 9

Two shapes are similar if…

Answer 9

they are enlargements of each other. Corresponding sides will have a common scale factor called the length scale factor. If the angles in both of the shapes are the same then they are also similar.

Question 10

Pie chart symbol - E

Answer 10

Is an element of

Question 11

Pie chart symbol - P

Answer 11

probability of

Question 12

Pie chart symbol - C

Answer 12

is a subset of

Question 13

what does this mean: P(A n B)

Answer 13

Probability of a number being in A and B

Question 14

Pie chart symbol - I

Answer 14

given that… (the Pie chart symbol - Probability of attending spinning given that they attended circuits)

Question 15

How to find the gradient of a line

Answer 15

y2 - y1 / x2 - x1

Question 16

How to find the midpoint of the line

Answer 16

x2+x1 /2 , y2+y1 /2

Question 17

What do perpendicular lines have in common?

Answer 17

the product of their gradients is always -1

Question 18

Anything to the power of zero =

Answer 18

1

Question 19

how to simplify

16-4 / 81

Answer 19

They both have to have the same base number
(24)-4 / (23)1
2*-19

Question 20

What happens if something is to the power of a half

Answer 20

Square root it

Question 21

Powers of m/n (fractions)

Answer 21

(n*root of number) to the power of m

Question 22

Powers of -n

Answer 22

1/number*n

one over number to the power of n

Question 23

percentage change =

Answer 23

new / old

Question 24

How to find the length of the line joining two coordinates

Answer 24

(x2 - x1)^2 + (y2 - y1)^2

Question 25

what circle theorem would you use when you are given two radii joined at the centre and two chords joined at the circumference

Answer 25

Angle at the centre of a circle is twice the angle at the circumference, both subtended by the same arc

Question 26

what circle theorem would you use when given a triangle whose base length is the diameter

Answer 26

The angle in a semicircle is a right angle

Question 27

what circle theorem would you use when many of the bases of triangles are joined in the same place

Answer 27

Angles in the same segment are equal

Question 28

what angle theorem would you use when there is a square with all four points inside the circle

Answer 28

Opposite angles of a cyclic quadrilateral add up to 180*

cyclic quadrilateral = all vertices lie on the line

Question 29

what circle theorem would you use when given a tangent and a radius

Answer 29

The angle between a tangent and a radius of a circle is 90*

Question 30

what circle theorem would you use when given two tangents joined outside the circle

Answer 30

Tangents to a circle from a point outside the circle are equal in length

Question 31

what circle theorem would you use when there is a tangent and three connected chords

Answer 31

The angle between a tangent and a chord is equal to the angle in the alternate segment

Question 32

What does U mean in pie charts

Answer 32

Union - everything inside the circles

Question 33

what does n mean in pie charts

Answer 33

Intersection - everything in the joins

Question 34

What does the circle with a line through it mean in pie charts

Answer 34

empty set

Question 35

What does A’ mean in pie charts

Answer 35

not A

Question 36

to draw a cumulative frequency graph from and inequality table where would you plot the first point

Answer 36

from the highest number of the inequality

eg 15<a></a>

Question 37

when would you need to use a dotted line on a graphical inequality graph

Answer 37

when the line is not equal to

eg x < 1

Question 38

how to calculate compound interest

eg £9000 with aa compound interest of 1.8% for 3 years

Answer 38

(1.018)^3 x 9000

Question 39

Formula for volume of a pyramid

Answer 39

(Base width x base length x perpendicular height) / 3