Formulas

Question 1

Area of a parallelogram?

Answer 1

Base x Height

Question 2

Area of a triangle?

Answer 2

1/2Base x Height

Question 3

Area of a trapezium?

Answer 3

1/2(a+b)h

Half the sum of the parallel sides times the distance between them, that’s how you calculate the area of a trapezium

Question 4

Circumference?

Answer 4

Pi x diameter
Or
2 x Pi x Radius

Question 5

Area of a circle?

Answer 5

Pi x Radius squared

Question 6

Pythagoras’ theorem?

Answer 6

Only for right angle triangles

A squared + B squared = C squared

Question 7

Quadratic equation

AX^2 + Bx + C = 0

Answer 7

-b+/- _/(b^2-4ac)
___________________
2a

Question 8

Volume of a cuboid

Answer 8

Length x width x height

Question 9

Volume of a prism

Answer 9

Area of cross section x length

Question 10

Volume of a cylinder

Answer 10

Pi x Radius squared x height

Question 11

Volume of a pyramid

Answer 11

1/3 x area of base x height

Question 12

Speed

Answer 12

Distance
_________

Time

Question 13

Density

Answer 13

Mass
_______

Volume

Question 14

Pressure

Answer 14

Force
______

Area

Question 15

Sine rule

Answer 15

a b c
______ = ______ = ______
Sin A Sin B Sin C

Question 16

Cosine rule

Answer 16

a^2 = b^2 + c^2 - 2bc x Cos A

Question 17

Area of triangle with trig

Answer 17

1/2 ab x Sin c

Question 18

3D Pythagoras

Answer 18

Width^2 + height^2 + depth^2 = diagonal^2

Question 19

What do you use to work out a right angle triangle (in trig)

Answer 19

Soh cah toa

Question 20

How do you find missing angles using trig?

Answer 20

Inverse sin cos & tan

Question 21

Rules of bearings

Answer 21

Measure clockwise

Put 0 before number of needed (001, 067, 978)

Question 22

When do we use the sine rule?

Answer 22

The triangle isn’t a right angle

When you know a side and it’s opposite angle

Question 23

Right angled triangle uses…

Answer 23

Sohcahtoa
OR
Pythagoras

Question 24

NOT right angle triangle

You KNOW a side and it’s opposite angle

Answer 24

Sine rule

Question 25

NOT a right angle triangle

You don’t know a side and it’s opposite angle

Answer 25

Cosine rule

Question 26

How do you work out the enlarged area of a shape

Answer 26

Original area x SF^2

Question 27

How do you work out the enlarged volume

Answer 27

Original volume x SF^3

Question 28

In probability, the word AND means…

Answer 28

Probabilities are MULTIPLIED

Question 29

In probability the word OR means…

Answer 29

the probabilities are ADDED

Question 30

nth term

Answer 30

Difference x n + zero term