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Key Facts About Pie Charts

Part of Pie Charts — GCSE Mathematics

This key facts covers Key Facts About Pie Charts within Pie Charts for GCSE Mathematics. Revise Pie Charts in Statistics for GCSE Mathematics with 14 exam-style questions and 20 flashcards. This is a high-frequency topic, so it is worth revising until the explanation feels precise and repeatable. It is section 2 of 7 in this topic. Use this key facts to connect the idea to the wider topic before moving on to questions and flashcards.

Topic position

Section 2 of 7

Practice

14 questions

Recall

20 flashcards

Key Facts About Pie Charts

  • Total circle: Always represents 360°
  • Sector angle: Proportional to the data value
  • Formula: Angle = (Value ÷ Total) × 360°
  • Best for: Categorical data showing parts of a whole
  • Sectors: Each slice represents one category
  • Labels: Should show category names and values/percentages

Keep building this topic

Read this section alongside the surrounding pages in Pie Charts. That gives you the full topic sequence instead of a single isolated revision point.

Visualizing Parts of a WholeCreating Pie ChartsPie Chart Example: Favorite SubjectsReading and Interpreting Pie Charts

Practice Questions for Pie Charts

A pie chart shows the results of a survey about favourite holiday destinations. The sectors have the following angles: - Beach: 144° - City: 90° - Countryside: 72° - Mountains: 54° Which destination is the modal category?

  • A. Beach
  • B. Countryside
  • C. City
  • D. Mountains
1 markfoundation

A newspaper reports that a pie chart shows Company A has a 'dominant market share' in the smartphone industry, with their sector taking up nearly half the chart. A critic argues that the pie chart is misleading. Explain two limitations of using a pie chart in this context, and suggest what additional information would make the chart more useful.

4 markschallenge

Quick Recall Flashcards

What are the steps to draw a pie chart?
1. Calculate each sector angle 2. Check angles add to 360° 3. Draw a circle with compass 4. Mark center and draw radius 5. Use protractor to measure each angle 6. Label each sector 7. Add title and legend
What is a pie chart?
A pie chart is a circular diagram divided into sectors, where each sector represents a category of data. The size of each sector is proportional to the frequency or amount it represents.

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Visualizing Parts of a Whole

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Creating Pie Charts