Pie Charts

1
Pie Charts

• Be able to construct a pie chart from a
  collection of data, using a protractor.

2
Work out the missing numbers on this number spider
12
90
30
30
4
12
360
4
15
90
24
20
15
18
24
10
36
3
Makes of car in a school car park
Construct a pie chart to show this information. A
full circle is 360o There are a total of 3241
10 cars We use 36o to represent each car
360o
4
Makes of car in a school car park
3x36o108o
2x36o72o
4x36o144o
1x36o36o
We use 36o to represent each car so the3
Cavaliers are represented by 3x36o 108o Work
out the angle needed for each of the other models
of car
5
Makes of car in a school car park
Mark the centre of the pie and draw the
circle. Draw a line from the centre to the
edge Measure the first angle needed (108o) Draw
in the line and label the section
Cavalier
108o
6
Makes of car in a school car park
From this line measure the next angle, draw the
line and label the section. Continue in this
way Check that the last section has the correct
angle and label it.
Volvo
36o
Cavalier
Rover
144o
72o
Ford
7
Why?

• Why do we use 36o to represent 1 car?
• What would happen if there were 20 cars?
• What about 60 cars? Or 15 cars?
• If there were 20 cars in your survey, what angle
  would you use to represent 4 cars? 7 cars? 12
  cars?

8
Construct Pie charts questions

• Q1 A survey of how 30 pupils got to school
• Q2 How Cameroon spent his 40 birthday money
• Q3 Who is your favourite Telly-Tubby survey.

9
Interpreting Pie Charts

• 20 pupils in class 3B travel to school. From the
  chart find the number of pupils who travel by
  each method.
• Walk
• Cycle
• Bus

10
180 boys in year 5 chose their favourite sport.
From the chart find how many chose each sport.
11
300 passengers boarded a train in London. From
the chart find how many are travelling to each
destination.
12
150 packets of crisps were sold from a vending
machine. From the chart find the number for each
flavour. Find also the percentage for each.
13
Answers
SportsFootball 72, Rugby 40, Hockey 30Cross
Country 20, Squash 18 pupils. Passengers
Southampton 100, Bournemouth 75, Poole 50,
Branksome 45, Parkstone 30. Crisps Plain 60,
Cheese Onion 45,Salt Vinegar 30, Prawn
Cocktail 15