Formulae

Question 1

Volume of a cylinder

Curved surface area of cylinder

Answer 1

Pie r squared h

2 pie r h

Question 2

Volume of cone

Curved surface area of cone

Answer 2

1/3 pie r squared h

Pie r l

Question 3

Volume of sphere

Surface area of sphere

Answer 3

4/3 pie r cubed

4 pie r squared

Question 4

Stratified sampling

Answer 4

Group number/ total * sample size

Question 5

Quadratic formula

Form

Answer 5

-b +- the square root of b squared minus 4 a c all dived by 2 a

Ax squared + bx+ c=0

Question 6

Length of diagonal across a cuboid

Answer 6

D squared =a squared + b squared + c squared

Question 7

Area of a parallelogram

Answer 7

B*h

Question 8

Area of sector
Length of arc of sector
Perimeter of sector

Answer 8

Delta/360* pie r squared
Delta/360* pie d
Angle/360 *pie r squared

Question 9

Density

Speed

Answer 9

Mass/volume

Distance/time

Question 10

Circumference of circle

Answer 10

Pie d

Question 11

Histograms

Answer 11

Frequency density= frequency/ class width

Question 12

Area of triangle

Answer 12

1/2 b h

Question 13

Volume of pyramid

Answer 13

1/3 * area of base* height

Question 14

Volume of prism

Answer 14

Area of cross section* length

Question 15

Volume of cuboid

Answer 15

L w h

Question 16

Pressure

Answer 16

Force / area

Question 17

Cosine rule (2 sides and angle in the middle)

Answer 17

a squared=b squared + c squared- 2 b c Cos A

Question 18

Cosine ( three sides one angle)

Answer 18

CosA = a squared minus b squared minus c squared/ -2 bc

Question 19

Sine rule (2 sides and 2 angles)

Side
Angle

Answer 19

a/Sin A

SinA/ a

Question 20

Pythagoras theorem

Answer 20

a squared + b squared = c squared

Question 21

Area of a rectangle

Answer 21

L w

Question 22

Area of trapezium

Answer 22

1/2 (a +b) h

Question 23

Area of a circle

Answer 23

Pie r squared

Question 24

Area of a non right angled triangle

Answer 24

1/2 a b sin C