Targeting Grade C

1
GCSE Mathematics
Targeting Grade C
Handling Data Unit 4 Pie Charts
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TOP Revise angles Practice 1 How to draw a
pie chart Practice 2 Answer questions about
pie charts Test

• Can you
• Draw a pie chart
• Answer questions from pie charts
• Try a test

3
Are you ready for the answers ?

• Answers
• 360º
• 180º
• 90º
• Looks like a square
• Two equal sides, two equal angles
• All sides and angles equal
• 360º
• Add up to 180º
• 360º
• All sides and angles are different

• TOP
• How many degrees in a circle?
• How many degrees in a triangle?
• How many degrees in a right angle?
• How do we recognize a right angle?
• What makes a triangle isosceles?
• How do we know if a triangle is equilateral?
• How many degrees in a quadrilateral?
• What do we know about an interior and exterior
  angle?
• What do all exterior angles add up to?
• Write a fact about scalene triangles.

Lesson
4

• Practice 1 Draw the pie charts from the tables
  below.
• 1)
• 2)

Remember Step 1 Total frequency if not
given Step 2 360º ? Total Frequency Step 3
Multiply each group by the answer to Step 2 Step
4 Draw the pie chart Step 5 Label carefully
Lesson
5

• Practice 2
• The pie chart shows how Jenny spends her monthly
  income.
• Jenny spends 150 a month on food.
• (a) Work out Jennys monthly income
• (b) Work out how much Jenny spends on rent each
  month.

Put the angle in the pie chart over 360 (like a
fraction), cancel down if possible and then
relate it to the money Jenny has.
Next
6

• The pie chart gives information about the bills
  paid by a Water Company.
• (a) Work out the size of the angle representing
  Wages.
• The Water Company spent 18 000 on Materials.
• (b) Work out the amount it spent on Rates.

Lesson
7
Test

• 1) Patrick carried out a survey of 45 pupils in
  Year 11. He asked how many books they had
  borrowed from the library in the last month.
  These are Patricks results.

(a) Copy and complete the table.
(b) Construct a pie chart to show this
information.
Are you ready for the answers ?
Next
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Answers to Q1
Angles 11 ? 8 88º 15 ? 8 120º 13 ?
8 104º 6 ? 8 48º
Next
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2) In a town, 1800 cars were stolen in a year.
The table show information about the times of day
in which they were stolen.
This information can be shown on a pie chart. (a)
Copy out the table below and work out the angles
for each sector.
Are you ready for the answers ?
(b) Construct the pie chart. (c) What fraction of
cars were stolen between midday and 6pm. Write
your answer in its simplest terms.
Next
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Answers to Q2.

• Angles 700 ? 0.2 140º
• 80 ? 0.2 16º
• 280 ? 0.2 56º
• 470 ? 0.2 94º
• 270 ? 0.2 140º

(c) 280 7 1800 45
Lesson