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Year 8 - Maths

Constructing pie charts

Graphical representations of data

Unit Summary

In this unit pupils will interpret and construct a range of representations of data including bar charts, pie charts and scatter graphs.

Lesson Summary

You will learn to construct pie charts from data.

Key Notes

  • Data presented as a list can be represented as a pie chart.
  • Data presented in a table can be represented as a pie chart.
  • A larger data set requires considering the proportion of the total.

Vocabulary To Learn

  • Sector: A sector is the region formed between two radii and their connecting arc.

Common Mistakes To Avoid

  • The frequencies on the frequency table are the angles you plot onto the pie chart.

3 Quick Questions (With Answers)

1. Solve this in steps: explain the method from this lesson and why each step matters.

Data presented as a list can be represented as a pie chart. Data presented in a table can be represented as a pie chart.

2. Use this key word in a maths sentence and explain it clearly. 'Sector'

A sector is the region formed between two radii and their connecting arc. Use this word when showing your method, then check your final answer is reasonable.

3. Spot and fix this common maths mistake.

Mistake: The frequencies on the frequency table are the angles you plot onto the pie chart. Correction: Challenge the misconception by using an example with frequencies that clearly add to more or less than 360 e.g. {90, 90, 180, 90, 60).

More Lessons In This Unit

Browse all guides in the Year 8 Maths guide library.